Fix gen-vect-26.c testcase after loops with multiple exits [PR113167]

This fixes the gcc.dg/tree-ssa/gen-vect-26.c testcase by adding
`#pragma GCC novector` in front of the loop that is doing the checking
of the result. We only want to test the first loop to see if it can be
vectorize.

Committed as obvious after testing on x86_64-linux-gnu with -m32.

gcc/testsuite/ChangeLog:

	PR testsuite/113167
	* gcc.dg/tree-ssa/gen-vect-26.c: Mark the test/check loop
	as novector.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>

gcc/testsuite/gcc.dg/tree-ssa/gen-vect-26.c

@@ -19,6 +19,7 @@ int main ()
     }
 
   /* check results:  */
+  #pragma GCC novector
   for (i = 1; i <= N; i++)
     {
       if (ia[i] != 5)