Fix tests for gomp

This is to fix testisms initially introduced by:
commit f5fc001a
Author: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date:   Mon Dec 11 14:24:41 2023 +0000

    aarch64: enable mixed-types for aarch64 simdclones

gcc/testsuite/ChangeLog:

	* gcc.dg/gomp/pr87887-1.c: Fixed test.
	* gcc.dg/gomp/pr89246-1.c: Likewise.
	* gcc.dg/gomp/simd-clones-2.c: Likewise.

libgomp/ChangeLog:

	* testsuite/libgomp.c/declare-variant-1.c: Fixed test.
	* testsuite/libgomp.fortran/declare-simd-1.f90: Likewise.