predicates.md (reg_or_mem_operand): Pair up match_code "mem" with match_test "macho_lo_sum_memory_operand".

	* config/rs6000/predicates.md (reg_or_mem_operand): Pair up
	match_code "mem" with match_test "macho_lo_sum_memory_operand".

From-SVN: r109835