The FreeBSD-clang package contains a 32-bit shared object at
/usr/lib/clang/19/lib/freebsd/libclang_rt.asan-i386.so
This is expected, since clang uses this object when compiling for i386
targets with asan enabled.
What is not expected is that the FreeBSD-clang package current depends
on 32-bit libc packages due to pkg's shared library analysis, making it
impossible to install pkgbase on x86_64 without any lib32 packages.
This commit leverages a new pkg feature implemented in [1], but could
be landed before a pkg version including that feature is released
without any ill effects. Unknown keys in package manifests are ignored.
[1]: https://github.com/freebsd/pkg/pull/2594
Sponsored by: The FreeBSD Foundation