Generally link to libgomp for -ftree-parallelize-loops=*.

Generally link to libgomp for -ftree-parallelize-loops=*.

	gcc/
	* config/arc/arc.h (LINK_COMMAND_SPEC): For
	-ftree-parallelize-loops=*, link to libgomp and its dependencies.
	* config/ia64/hpux.h (LIB_SPEC): Likewise.
	* config/pa/pa-hpux11.h (LIB_SPEC): Likewise.
	* config/pa/pa64-hpux.h (LIB_SPEC): Likewise.
	* gcc.c (GOMP_SELF_SPECS): Update comment about libgomp's
	dependencies.
	libgomp/
	* libgomp.spec.in: Update comment about libgomp's dependencies.
	* configure.ac: Likewise.
	* configure: Regenerate.

From-SVN: r204517