superiotool: Add support for git-based version number

The superiotool Makefile extracts a version string from SVN. This does not work
with a git repository, and results in an empty version string. Use the output of
'git describe' as version string instead.

Change-Id: Idf92c02753b28ef5bcdd3b6df4a08d79ae974434
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-on: http://review.coreboot.org/1151
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
1 file changed