clients/android/devenv: add go:build directive

[nor...@perkeep.org]

https://github.com/perkeep/perkeep/commit/e5fbf880296db4e1e35f783537c42d8c04cbc5f5

commit e5fbf880296db4e1e35f783537c42d8c04cbc5f5
Author: Sebastien Binet <bi...@cern.ch>
Date: Wed Jun 1 10:04:03 2022 +0200

clients/android/devenv: add go:build directive

Signed-off-by: Sebastien Binet <bi...@cern.ch>

diff --git a/clients/android/build-in-docker.go b/clients/android/build-in-docker.go
index a6d3ac7..3801ef8 100755
--- a/clients/android/build-in-docker.go
+++ b/clients/android/build-in-docker.go
@@ -1,3 +1,4 @@
+//go:build ignore
// +build ignore

/*