Merge from poky:

Merge from poky:
    Rework the way patches are handled.  There are now two abstract base classes,
    initialized in patch.bbclass.  One for patchset operations on a directory, and
    another for patch failure resolution.  Currently includes 'patch' and 'quilt'
    concrete PatchSet classes, and a 'user' resolver class, which simply drops you
    into a shell in the source tree to fix the rejects.