util/crossgcc: fix using -D

Otherwise errors similar to "touch: cannot touch
'${TARGETDIR}/.GMP.6.1.0.success': No such file
or directory" might occur.

Change-Id: I4f24c93a25b7d567d3ce14a0415d20fd0778c9c8
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/17603
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
1 file changed