Happened way too often that crossgcc failed
because m4 or bison wasn't installed already.
Change-Id: Ibcca2183edd5db20608015e3898f8fff9a6d11e8
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/1026
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>