gnupg: use native version for signing, rather than one provided by host
Using host gpg has been problematic, and particularly this removes
the need to serialize package creation, as long as --auto-expand-secmem
is passed to gpg-agent, and gnupg >= 2.2.4 is in use
(https://dev.gnupg.org/T3530).
Sadly, gpg-agent itself is single-threaded, so in the longer run
we might want to seek alternatives:
https://lwn.net/Articles/742542/
(a smaller issue is that rpm itself runs the gpg fronted in a serial
fashion, which slows down the build in cases of recipes with very
large amount of packages, e.g. glibc-locale)
Note that sstate signing and verification continues to use host
gpg, as depending on native gpg would create circular dependencies.
[YOCTO #12022]
Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
