omp-low.c (scan_sharing_clauses): Accept INDEPENDENT, AUTO & SEQ.

omp-low.c (scan_sharing_clauses): Accept INDEPENDENT, AUTO & SEQ.

	gcc/
	* gcc/omp-low.c (scan_sharing_clauses): Accept INDEPENDENT, AUTO &
	SEQ.
	(oacc_loop_fixed_partitions): Correct return type to bool.
	(oacc_loop_auto_partitions): New.
	(oacc_loop_partition): Take mask argument, call
	oacc_loop_auto_partitions.
	(execute_oacc_device_lower): Provide mask to oacc_loop_partition.

	gcc/testsuite/
	* c-c++-common/goacc/loop-auto-1.c: New.

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/loop-auto-1.c: New.

From-SVN: r230354