Committed: arc_ccfsm_post_advance: Fix 1->3 state transition for TYPE_UNCOND_BRANCH

[Joern Rennecke]

        * gcc/config/arc/arc.c (arc_ccfsm_post_advance): Also handle
        TYPE_UNCOND_BRANCH.
        (arc_ifcvt) <case 1 and 2>: Check that arc_ccfsm_post_advance
        changes statep->state.