Log Message:
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syz-manager: fix endianess for covfilter test
Support little as well as big endian architectures.
Fixes this on s390x arch:
=== RUN TestCreateBitmap
2021/01/12 16:42:44 coverage filter from 0x81000000 to 0x81200020, size 0x200020, pcs 2
covfilter_test.go:22: bad region 0x81/0x20002000
--- FAIL: TestCreateBitmap (0.18s)