Set num_threads to 50 on 32-bit hppa in two libgomp loop tests

We support a maximum of 50 threads on 32-bit hppa.

2024-02-01  John David Anglin  <danglin@gcc.gnu.org>

libgomp/ChangeLog:

	* testsuite/libgomp.c++/loop-3.C: Set num_threads to 50
	on 32-bit hppa.
	* testsuite/libgomp.c/omp-loop03.c: Likewise.