The make `file` command is apparently a v4.2 feature only. Replace it
with a shell cat.
BUG=none
TEST=verified fwid.region was created correctly
Change-Id: I5e32a521ad3e6759853f0cde2e4c4db6e564d3be
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/27990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Julius Werner <jwerner@chromium.org>
128b0cf66e