Restore arc.c change from commit f826e0d517db5f0f0b44b888083b2ca2d992ca58
that was accidentally overwritten by 1924bed4811889a2957851d904fa10d1453bf041:

	* gcc/config/arc/arc.c (arc_legitimate_constant_p): When
	calling arc_raw_symbolic_reference_mentioned_p, pass false as
	skip_local argument.