Update parloops-exit-first-loop-alt{,-2,-3}.c

Update parloops-exit-first-loop-alt{,-2,-3}.c

2015-06-13  Tom de Vries  <tom@codesourcery.com>

	* testsuite/libgomp.c/parloops-exit-first-loop-alt-2.c: Add comment.
	* testsuite/libgomp.c/parloops-exit-first-loop-alt.c: Same.
	* testsuite/libgomp.c/parloops-exit-first-loop-alt-3.c: Add comment.
	(N): Define.
	(main): Use N instead of hardcoded constants.

	* gcc.dg/parloops-exit-first-loop-alt-2.c: Add comment.
	(main): Remove superfluous attributes.
	* gcc.dg/parloops-exit-first-loop-alt-3.c: Same.
	* gcc.dg/parloops-exit-first-loop-alt.c: Same.

From-SVN: r224452