Fix testsuite failure for avr target

The test has integer literals that only fit on a target with int size 32+.

gcc/testsuite/

2016-09-16  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

	* gcc.dg/torture/pr70421.c: Require int32plus.

From-SVN: r240186

gcc/testsuite/ChangeLog

+2016-09-16  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	* gcc.dg/torture/pr70421.c: Require int32plus.
+
 2016-09-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/77475

gcc/testsuite/gcc.dg/torture/pr70421.c

 /* PR target/70421 */
 /* { dg-do run } */
+/* { dg-require-effective-target int32plus } */
 /* { dg-additional-options "-Wno-psabi -w" } */
 
 typedef unsigned V __attribute__ ((vector_size (64)));