Ensure zlib version is printed by git-version(1)

I was trying to benchmark the difference between using zlib and zlib-ng. To be sure I was testing the correct version, I was interested if git-version(1) would tell which zlib library it uses. After some digging I saw it should be printing the zlib version number, but on my machine it wasn't.

I discovered a regression caused by 41f1a843 (git-compat-util: move include of "compat/zlib.h" into "git-zlib.h", 2025-01-28). In the first commit I'm addressing that regression.

But I've noticed building against zlib-ng directly still didn't print the zlib version. This issue is resolved in the second commit.

-- Toon

Signed-off-by: Toon Claes toon@iotcl.com Cc: Patrick Steinhardt ps@pks.im

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This section is used internally by b4 prep for tracking purposes.

{ "series": { "revision": 1, "change-id": "20250307-toon-zlib-git-version-a7dcb9caa1ef", "prefixes": [] } }