u-boot-libre: Set tar mtime to SOURCE_DATE_EPOCH or @0

The u-boot-libre tarball contents' mtimes are an unconventional value
due to timezone confusion. For reproducibility, timestamps like these
are usually set by a SOURCE_DATE_EPOCH which is respected by both
coreboot and U-Boot. Use it in the u-boot-libre release script as well,
and properly set the mtimes to the Unix epoch when it's not defined.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

0 files changed, 0 insertions, 0 deletions