libgomp: Fix libgomp.c/affinity-1.c on non-Linux

libgomp: Fix libgomp.c/affinity-1.c on non-Linux

The new libgomp.c/affinity-1.c test FAILs on Solaris and Darwin:

FAIL: libgomp.c/affinity-1.c (test for excess errors)

Excess errors:
libgomp.c/affinity-1.c:194:3: warning: 'omp_proc_bind_master' is deprecated [-Wdeprecated-declarations]
libgomp.c/affinity-1.c:267:3: warning: 'omp_set_nested' is deprecated [-Wdeprecated-declarations]
libgomp.c/affinity-1.c:272:5: warning: 'omp_proc_bind_master' is deprecated [-Wdeprecated-declarations]
libgomp.c/affinity-1.c:285:43: warning: 'master' affinity deprecated since OpenMP 5.1, use 'primary' [-Wdeprecated-openmp]

and several more.  This happens because the required -Wno-* options have
only been added for Linux.  This patch adds them unconditionally
instead.

Tested on i386-pc-solaris2.11, sparc-sun-solaris2.11,
x86_64-apple-darwin25.1.0, and x86_64-pc-linux-gnu.

2025-12-17  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	libgomp:
	* testsuite/libgomp.c/affinity-1.c: Always add warnings.