testsuite: Fix up pr56719.c testcase [PR98489]

On some targets, there are no < 8191; and >= 8191; strings,
but < 8191) and >= 8191), so just remove the ; from the regexps.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

	PR testsuite/98489
	PR tree-optimization/56719
	* gcc.dg/tree-ssa/pr56719.c: Remove semicolon from
	scan-tree-dump-times regexps.