If the config file is tracked within the combo-layer repository and it
is updated at the end of the "update" operation (because last_revision
has been changed), then automatically commit the file. This ensures that
multiple people can perform updates on different machines without the
last revision information going missing.
(If the file is outside the repository or is masked via .gitignore, this
will do nothing.)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
