This creates a new predefined allocator as a shortcut for using pinned
memory with OpenMP.  The name uses the OpenMP extension space and is
intended to be consistent with other OpenMP implementations currently in
development.

The allocator is equivalent to using a custom allocator with the pinned
trait and the null fallback trait.

libgomp/ChangeLog:

	* allocator.c (omp_max_predefined_alloc): Update.
	(omp_aligned_alloc): Support ompx_pinned_mem_alloc.
	(omp_free): Likewise.
	(omp_aligned_calloc): Likewise.
	(omp_realloc): Likewise.
	* omp.h.in (omp_allocator_handle_t): Add ompx_pinned_mem_alloc.
	* omp_lib.f90.in: Add ompx_pinned_mem_alloc.
	* testsuite/libgomp.c/alloc-pinned-5.c: New test.
	* testsuite/libgomp.c/alloc-pinned-6.c: New test.
	* testsuite/libgomp.fortran/alloc-pinned-1.f90: New test.
---
 libgomp/allocator.c                           |  60 +++++++----
 libgomp/omp.h.in                              |   1 +
 libgomp/omp_lib.f90.in                        |   2 +
 libgomp/testsuite/libgomp.c/alloc-pinned-5.c  |  90 ++++++++++++++++
 libgomp/testsuite/libgomp.c/alloc-pinned-6.c  | 101 ++++++++++++++++++
 .../libgomp.fortran/alloc-pinned-1.f90        |  16 +++
 6 files changed, 252 insertions(+), 18 deletions(-)
 create mode 100644 libgomp/testsuite/libgomp.c/alloc-pinned-5.c
 create mode 100644 libgomp/testsuite/libgomp.c/alloc-pinned-6.c
 create mode 100644 libgomp/testsuite/libgomp.fortran/alloc-pinned-1.f90