python3-numpy: backport a Meson patch to fix pkg-config lookups

python3-numpy: backport a Meson patch to fix pkg-config lookups

When Meson uses pkg-config to introspect the Python install it resets
PKG_CONFIG_PATH and PKG_CONFIG_LIBDIR to the location that the running
python3 says is the library directory. However, when it writes to
PKG_CONFIG_LIBDIR it uses the _target_ library directory without
prefixing this with the sysroot, which breaks the build if _LIBDIR is
the primary search path.

This has been fixed in Meson since 1.10.0[1] but numpy has a vendored
fork of Meson that is currently at 1.9.2, so backport the specific fix
to solve this problem.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>