util/genbuild_h: Update version calculation

- 'git describe --match [0-9].[0-9]*' was giving me an error, so use
the basic 'git describe' command instead.
- If a .coreboot-version file exists, use that to determine the version.
This fixes the problem for coreboot releases.
- Don't run git for the versions unless it's being built from a valid
git repository.  Use 0.0 as the default version for timeless or unknown.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I5fae2f012cc9b9914d8803af8dd58a885358cb1a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70055
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

0 files changed, 0 insertions, 0 deletions