Fix build with CLANG, avoid GCC only CFLAGS

Commit 7c8d331fbb "Fine-tune compiler flags" added CFLAGS that are not
existing on CLANG hence breaking building coreboot with clang.

Fixes: https://ticket.coreboot.org/issues/134

Change-Id: Ie0250e285b0c5a9f8ee2eb99401aeca875d2789a
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/21202
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Damien Zammit <damien@zamaudio.com>
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions