Makefile: Add simple compilation rule for C

We only use C as an interface (e.g. to POSIX). Thus, we keep the rules
simple and don't do any dependency tracking.

Change-Id: I62b4b4e4d3ae83d5e1f1811f783b559b225746e6
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/18778
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed