MSVC: Teach find_library to consider the 'libfoo.a' naming convention

When targeting the GNU ABI, we consider `.a` libraries first but also
accept `.lib`.  For symmetry, when targeting the MSVC ABI, we now
consider `.lib` first but also accept `.a`.

This adds support for meson-generated static libraries, which are named
with the pattern `lib${foo}.a`:

* https://mesonbuild.com/FAQ.html#why-does-building-my-project-with-msvc-output-static-libraries-called-libfooa

Fixes: #23975
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
2 files changed