configure: Include quotes around pkg_version

In some MSYS environments it can happen that the 3 argument syntax
for pkg-config library specifications fails because somehow the
expansion of pkg_version ends up with a redirection we guess.

To avoid failures like in the referenced build[2], we quote it
so the whole module including operators will be expanded into
a single shell word and the single argument syntax for specifying
the library for pkg-config will be used.

The single argument syntax seems to be supported by the original
pkg-config from the beginning more than 20 years[3].

In the pkgconf implementation single argument syntax was supported
pretty much from the beginning as well. The multiple argument syntax
we used until this change, was not supported until a change[4] more
than 10 years ago.

References
----------

1. Build passing with quotes:
   https://github.com/JoeSchiff/pyav-ffmpeg/actions/runs/12358403929
2. Build failing without quotes:
   https://github.com/JoeSchiff/pyav-ffmpeg/actions/runs/12360472377
3. Earliest commit of the current pkg-config Git repo already mentions the single argument syntax:
   https://gitlab.freedesktop.org/pkg-config/pkg-config/-/commit/2ac96cbcc708d8945329fd1b2001386e1c895c64#124c0becfe68b1ef671f49ed2b9d24779ace126f_0_162
4. pkgconf gets support for 3 argument syntax (pkgconf --exists liba = 1.2.3):
   https://github.com/pkgconf/pkgconf/commit/793de6a06ca52fbfe906a269b5f2b2ba41739517

Commit-message-by: Alexander Strasser <eclipse7@gmx.net>
Signed-off-by: Joe Schiffler <joeschiffler3@gmail.com>
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>

0 files changed, 0 insertions, 0 deletions