[biocaml/biocaml] 09b77e: opam: enforce 64 bit architecture

[pveber]

Branch: refs/heads/master
Home: https://github.com/biocaml/biocaml
Commit: 09b77e951b311eb9308b20e6c3c4575fc2eeffac
https://github.com/biocaml/biocaml/commit/09b77e951b311eb9308b20e6c3c4575fc2eeffac
Author: Philippe Veber <philipp...@gmail.com>
Date: 2022-05-08 (Sun, 08 May 2022)

Changed paths:
M biocaml.opam
A biocaml.opam.template

Log Message:
-----------
opam: enforce 64 bit architecture

see ocaml/opam-repository#21338

The CI shows this on 32 bit architectures:

```
(cd _build/default && /home/opam/.opam/4.14/bin/ocamlc.opt -w -40 -short-paths -open Core -g -bin-annot -I lib/unix/.biocaml_unix.objs/byte -I /home/opam/.opam/4.14/lib/angstrom -I /home/opam/.opam/4.14/lib/base -I /home/opam/.opam/4.14/lib/base/base_internalhash_types -I /home/opam/.opam/4.14/lib/base/caml -I /home/opam/.opam/4.14/lib/base/md5 -I /home/opam/.opam/4.14/lib/base/shadow_stdlib -I /home/opam/.opam/4.14/lib/base64 -I /home/opam/.opam/4.14/lib/base_bigstring -I /home/opam/.opam/4.14/lib/base_quickcheck -I /home/opam/.opam/4.14/lib/base_quickcheck/ppx_quickcheck/runtime -I /home/opam/.opam/4.14/lib/bigstringaf -I /home/opam/.opam/4.14/lib/bin_prot -I /home/opam/.opam/4.14/lib/bin_prot/shape -I /home/opam/.opam/4.14/lib/cfstream -I /home/opam/.opam/4.14/lib/core -I /home/opam/.opam/4.14/lib/core/base_for_tests -I /home/opam/.opam/4.14/lib/core/validate -I /home/opam/.opam/4.14/lib/core_kernel -I /home/opam/.opam/4.14/lib/core_kernel/binary_packing -I /home/opam/.opam/4.14/lib/fieldslib -I /home/opam/.opam/4.14/lib/int_repr -I /home/opam/.opam/4.14/lib/jane-street-headers -I /home/opam/.opam/4.14/lib/parsexp -I /home/opam/.opam/4.14/lib/ppx_assert/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_bench/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_compare/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_enumerate/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_expect/collector -I /home/opam/.opam/4.14/lib/ppx_expect/common -I /home/opam/.opam/4.14/lib/ppx_expect/config -I /home/opam/.opam/4.14/lib/ppx_expect/config_types -I /home/opam/.opam/4.14/lib/ppx_expect/evaluator -I /home/opam/.opam/4.14/lib/ppx_expect/matcher -I /home/opam/.opam/4.14/lib/ppx_hash/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_here/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_inline_test/config -I /home/opam/.opam/4.14/lib/ppx_inline_test/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_log/types -I /home/opam/.opam/4.14/lib/ppx_module_timer/runtime -I /home/opam/.opam/4.14/lib/ppx_sexp_conv/runtime-lib -I /home/opam/.opam/4.14/lib/ppxlib/print_diff -I /home/opam/.opam/4.14/lib/re -I /home/opam/.opam/4.14/lib/re/perl -I /home/opam/.opam/4.14/lib/rresult -I /home/opam/.opam/4.14/lib/seq -I /home/opam/.opam/4.14/lib/sexplib -I /home/opam/.opam/4.14/lib/sexplib0 -I /home/opam/.opam/4.14/lib/splittable_random -I /home/opam/.opam/4.14/lib/stdio -I /home/opam/.opam/4.14/lib/stringext -I /home/opam/.opam/4.14/lib/time_now -I /home/opam/.opam/4.14/lib/typerep -I /home/opam/.opam/4.14/lib/uri -I /home/opam/.opam/4.14/lib/variantslib -I /home/opam/.opam/4.14/lib/xmlm -I /home/opam/.opam/4.14/lib/zip -I lib/base/.biocaml_base.objs/byte -intf-suffix .ml -no-alias-deps -open Biocaml_unix -o lib/unix/.biocaml_unix.objs/byte/biocaml_unix__Bam.cmo -c -impl lib/unix/bam.pp.ml)
File "lib/unix/bam.ml", line 627, characters 13-23:
627 | | Some 2147483647 (* POS in BAM is 0-based *)
^^^^^^^^^^
Error: Integer literal exceeds the range of representable integers of type int
(cd _build/default && /home/opam/.opam/4.14/bin/ocamlc.opt -w -40 -short-paths -open Core -g -bin-annot -I lib/unix/.biocaml_unix.objs/byte -I /home/opam/.opam/4.14/lib/angstrom -I /home/opam/.opam/4.14/lib/base -I /home/opam/.opam/4.14/lib/base/base_internalhash_types -I /home/opam/.opam/4.14/lib/base/caml -I /home/opam/.opam/4.14/lib/base/md5 -I /home/opam/.opam/4.14/lib/base/shadow_stdlib -I /home/opam/.opam/4.14/lib/base64 -I /home/opam/.opam/4.14/lib/base_bigstring -I /home/opam/.opam/4.14/lib/base_quickcheck -I /home/opam/.opam/4.14/lib/base_quickcheck/ppx_quickcheck/runtime -I /home/opam/.opam/4.14/lib/bigstringaf -I /home/opam/.opam/4.14/lib/bin_prot -I /home/opam/.opam/4.14/lib/bin_prot/shape -I /home/opam/.opam/4.14/lib/cfstream -I /home/opam/.opam/4.14/lib/core -I /home/opam/.opam/4.14/lib/core/base_for_tests -I /home/opam/.opam/4.14/lib/core/validate -I /home/opam/.opam/4.14/lib/core_kernel -I /home/opam/.opam/4.14/lib/core_kernel/binary_packing -I /home/opam/.opam/4.14/lib/fieldslib -I /home/opam/.opam/4.14/lib/int_repr -I /home/opam/.opam/4.14/lib/jane-street-headers -I /home/opam/.opam/4.14/lib/parsexp -I /home/opam/.opam/4.14/lib/ppx_assert/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_bench/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_compare/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_enumerate/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_expect/collector -I /home/opam/.opam/4.14/lib/ppx_expect/common -I /home/opam/.opam/4.14/lib/ppx_expect/config -I /home/opam/.opam/4.14/lib/ppx_expect/config_types -I /home/opam/.opam/4.14/lib/ppx_expect/evaluator -I /home/opam/.opam/4.14/lib/ppx_expect/matcher -I /home/opam/.opam/4.14/lib/ppx_hash/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_here/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_inline_test/config -I /home/opam/.opam/4.14/lib/ppx_inline_test/runtime-lib -I /home/opam/.opam/4.14/lib/ppx_log/types -I /home/opam/.opam/4.14/lib/ppx_module_timer/runtime -I /home/opam/.opam/4.14/lib/ppx_sexp_conv/runtime-lib -I /home/opam/.opam/4.14/lib/ppxlib/print_diff -I /home/opam/.opam/4.14/lib/re -I /home/opam/.opam/4.14/lib/re/perl -I /home/opam/.opam/4.14/lib/rresult -I /home/opam/.opam/4.14/lib/seq -I /home/opam/.opam/4.14/lib/sexplib -I /home/opam/.opam/4.14/lib/sexplib0 -I /home/opam/.opam/4.14/lib/splittable_random -I /home/opam/.opam/4.14/lib/stdio -I /home/opam/.opam/4.14/lib/stringext -I /home/opam/.opam/4.14/lib/time_now -I /home/opam/.opam/4.14/lib/typerep -I /home/opam/.opam/4.14/lib/uri -I /home/opam/.opam/4.14/lib/variantslib -I /home/opam/.opam/4.14/lib/xmlm -I /home/opam/.opam/4.14/lib/zip -I lib/base/.biocaml_base.objs/byte -intf-suffix .ml -no-alias-deps -open Biocaml_unix -o lib/unix/.biocaml_unix.objs/byte/biocaml_unix__Sam.cmo -c -impl lib/unix/sam.pp.ml)
File "lib/unix/sam.ml", line 216, characters 34-44:
216 | (if (1 <= length) && (length <= 2147483647) then
^^^^^^^^^^
```