GCC build instruction recommend to bootstrap a native compiler first.
Not sure, when that is really necessary. A major version change seems
reasonable.
Change-Id: I80a9ec25739b7d33a1d1c7b4b2140d19d89a99ae
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/16675
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>