New review comment by kruceter on void-packages repository

https://github.com/void-linux/void-packages/pull/41873#discussion_r1093880497

Comment:
```suggestion
Backported from:
https://github.com/libgit2/libgit2/commit/12d73c418253a5c396465079c2808e07de17a1db

diff --git a/tests/libgit2/CMakeLists.txt b/tests/libgit2/CMakeLists.txt
```

I see nothing wrong in removing the commit header, but it is better to indicate that you backported the patch from the "main" branch to clear confusion.