On FreeBSD, every build target would show warnings from its
builtin printf().
Change the regexp to be compatible with BSD sed.
This will avoid noise like "printf: 4.14-1278-g5d74ccf1c3: not
completely converted".
Signed-off-by: Idwer Vollering <vidwer@gmail.com>
Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
Change-Id: I1c0c260fd8d42e23a612a353a288e472cc068c8e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56803
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Nico Huber <nico.h@gmx.de>
70f3d43854