testsuite: Fix up c2x-enum-1.c for 32-bit arches [PR107311]

testsuite: Fix up c2x-enum-1.c for 32-bit arches [PR107311]

On Wed, Oct 19, 2022 at 02:57:59PM +0000, Joseph Myers wrote:
> I think the type checked for e5a should be conditional on __LONG_MAX__ >
> __INT_MAX__; everything else there should be OK regardless.

This patch does that.

2022-10-19  Jakub Jelinek  <jakub@redhat.com>

	PR c/107311
	* gcc.dg/c2x-enum-1.c (enum e5): Expect e5a type inside of
	enum to be int rather than long if long isn't wider than int.