Fix bogus test failure for avr

The test has a bunch of hardcoded integer literals that would fit only in a 
32 bits+ int, causing overflow warnings for a 16 bit int target like avr.

gcc/testsuite/ChangeLog

2016-09-27  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

	* gcc.dg/tree-ssa/builtin-sprintf-warn-1.c: Require int32plus.

From-SVN: r240528

gcc/testsuite/ChangeLog

+2016-09-27  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	* gcc.dg/tree-ssa/builtin-sprintf-warn-1.c: Require int32plus.
+
 2016-09-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR fortran/77666

gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-1.c

 /* { dg-do compile } */
 /* { dg-options "-std=c99 -Wformat -Wformat-length=1 -ftrack-macro-expansion=0" } */
+/* { dg-require-effective-target int32plus } */
 
 /* When debugging, define LINE to the line number of the test case to exercise
    and avoid exercising any of the others.  The buffer and objsize macros