skiboot: Use commit SHA instead of tag.

Using a tag forces bitbake to go out and try to contact the source
even if the repo has been downloaded in mirror tarball. It prevents
building on a machine without network access using a local mirror.

Change-Id: I71a984fc784ada82fa81294917c9e2fbc0a4935b
Signed-off-by: yuenn <yuenn@google.com>
1 file changed