5.10.85 changed how the GCC plugins are built, which means they now
depend on both GMP and MPC to be built. We already depend on gmp-native,
so add libmpc-native aswell.
(From OE-Core rev: 128abf5eb76dd0d2680c93f043bf7cac0a3552b8)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>