re PR c++/70376 (OpenMP taskloop construct fails to instantiate copy constructor(same as Bug 48869))

	PR c++/70376
	* cp-gimplify.c (genericize_omp_for_stmt): Don't walk OMP_FOR_CLAUSES
	for OMP_TASKLOOP here.
	(cp_genericize_r): Handle OMP_TASKLOOP like OMP_TASK, except do call
	genericize_omp_for_stmt instead of cp_walk_tree on OMP_BODY.

	* testsuite/libgomp.c++/pr70376.C: New test.

From-SVN: r234437