Now that zstd is in oe-core, add PACKAGECONFIG for it and enabled
it by default in libarchive.
zstd support is expected by CMake, which in nativesdk depends on
libarchive. CMake depends on having all formats supported and build
issues can arise when zstd is not available:
https://gitlab.kitware.com/cmake/cmake/-/issues/21552
Quote from a CMake dev:
"As far as CMake's design is concerned, we have no optional formats.
All should be supported. That's why we bundle sufficiently new versions
of libarchive and libzstd. If a distro builds with an older libarchive
that doesn't have zstd support, then that is not a proper packaging of CMake."
Signed-off-by: Samuli Piippo <samuli.piippo@qt.io> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
