lib/oe/patch: auto-commit when falling back from git am
When PATCHTOOL = "git", if we're not able to use "git am" to apply a
patch and fall back to "git apply" or "patch", it is desirable to
actually commit the changes, attempting to preserve (and interpret) the
patch header as part of the commit message if present. As a bonus, the
code for extracting the commit message is callable externally in case it
is useful elsewhere.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
