testsuite/libgomp.*/target-present-*.{c,f90}: Improve and fix

testsuite/libgomp.*/target-present-*.{c,f90}: Improve and fix

One of the testcases lacked variables in a map clause such that
the fail occurred too early. Additionally, it would have failed
for all those non-host devices where 'present' is always true, i.e.
non-host devices which can access all of the host memory
(shared-memory devices). [There are currently none.]

The commit now runs the code on all devices, which should succeed
for host fallback and for shared-memory devices, finding potenial issues
that way. Additionally, a checkpoint (required stdout output) is used
to ensure that the execution won't fail (with the same error) before
reaching the expected fail location.

2023-06-07  Thomas Schwinge  <thomas@codesourcery.com>
	    Tobias Burnus  <tobias@codesourcery.com>

libgomp/
	* testsuite/libgomp.c-c++-common/target-present-1.c: Run code
	also for non-offload_device targets; check that it runs
	successfully for those and for all until a checkpoint for all
	* testsuite/libgomp.c-c++-common/target-present-2.c: Likewise.
	* testsuite/libgomp.c-c++-common/target-present-3.c: Likewise.
	* testsuite/libgomp.fortran/target-present-1.f90: Likewise.
	* testsuite/libgomp.fortran/target-present-3.f90: Likewise.
	* testsuite/libgomp.fortran/target-present-2.f90: Likewise;
	add missing vars to map clause.