python3-numpy: inherit pkgconfig

python3-numpy: inherit pkgconfig

This was supposed to be added in oe-core commit fd656aaf7fbe
("python3-numpy: upgrade 1.26.4 -> 2.1.3"), but it somehow got missed in
the final version of that patch. Add it now to fix possible do_compile
errors on some systems, due to host paths sneaking into the meson build
options, e.g.:

| Build machine cpu family: x86_64
| Build machine cpu: x86_64
| Host machine cpu family: x86_64
| Host machine cpu: x86_64
| Target machine cpu family: x86_64
| Target machine cpu: x86_64
| Program python3 found: YES (/home/tgamblin/workspace/yocto/poky/build/tmp/work/core2-64-poky-linux-musl/python3-numpy/2.1.3/recipe-sysroot-native/usr/bin/nativepython3)
| Did not find pkg-config by name 'pkg-config'
| Found pkg-config: NO
| Run-time dependency python found: NO (tried pkgconfig, pkgconfig and sysconfig)
|
| ../numpy-2.1.3/meson.build:41:12: ERROR: Python dependency not found
|
| A full log can be found at /home/tgamblin/workspace/yocto/poky/build/tmp/work/core2-64-poky-linux-musl/python3-numpy/2.1.3/build/meson-logs/meson-log.txt

and notably (meson-log.txt snippet):

|x86_64-poky-linux-musl-g++ -m64 -march=core2 -mtune=core2 -msse3 -mfpmath=sse -fstack protector-strong -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/media/build/poky/build/tmp/work/core2-64-poky-linux-musl/python3-numpy/2.1.3/recipe-sysroot -I/media/build/poky/build/tmp/work/core2-64-poky-linux-musl/python3-numpy/2.1.3/recipe-sysroot/usr/include/python3.13 -I/usr/include/python3.13

A bug has been filed about this and the related gcc issue: https://bugzilla.yoctoproject.org/show_bug.cgi?id=15672

With pkgconfig on the inherit line, all include directives in
meson-log.txt end up looking something like:

|-I/home/tgamblin/workspace/yocto/poky/build/tmp/work/core2-64-poky-linux-musl/python3-numpy/2.1.3/recipe-sysroot/usr/include/python3.13

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>