7b8cfe34 (Merge branch 'ed/fsmonitor-on-networked-macos',
2022-10-17) broke the build on macOS with sha1dc by bypassing our
hash abstraction (git_SHA_CTX etc.), but it wasn't caught before the
problematic topic was merged down to the 'master' branch. Nobody
was even compile testing with DC_SHA1 set, although it is the
recommended choice in these days for folks when they use SHA-1.
This was because the default for macOS uses Apple Common Crypto, and
both of the two CI jobs did not override the default. Tweak one of
them to use DC_SHA1 to improve the coverage.
We may want to give similar diversity for Linux jobs so that some of
them build with other implementations of SHA-1; they currently all
build and test with DC_SHA1 as that is the default on everywhere
other than macOS.
But let's start small to fill only the immediate need.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1ad5c3df35