libgcc fails to compile on a number of platforms when a
non-GNU sed is used.
This patch has been verified by building the MIPS reference
toolchain on OS X.
Change-Id: Ia1c18ea4359de7707ac2e2640f1b8f107c47cd8c
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/14275
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>