libgomp/ChangeLog:

	* libgomp.texi (Runtime Library Routines): Document
	omp_pause_resource, omp_pause_resource_all and
	omp_target_memcpy{,_rect}{,_async}.

Co-authored-by: Sandra Loosemore <sandra@codesourcery.com>
Signed-off-by: Tobias Burnus <tburnus@baylibre.com>