package_rpm: pass XZ_THREADS to rpm
By default RPM uses the number of cores as the number of threads to use,
which can result in quite antisocial memory usage.
As we control the macros for compression anyway, we can pass XZ_THREADS
to limit the number of threads if needed.
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit
b9c983eb22a9b0771a0454216d1d7cbb5f3f8a16)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
