Fix bogus testsuite failures for avr.

gcc/testsuite/

2016-08-24  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

        * gcc.c-torture/execute/pr71083.c: Use UINT32_TYPE instead
        of unsigned int.
        * gcc.dg/zero_sign_ext_test.c: Require int32plus.

From-SVN: r239732

gcc/testsuite/ChangeLog

+2016-08-24  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	* gcc.c-torture/execute/pr71083.c: Use UINT32_TYPE instead
+	of unsigned int.
+	* gcc.dg/zero_sign_ext_test.c: Require int32plus.
+
 2016-08-24  Robert Suchanek  <robert.suchanek@imgtec.com>
 
 	PR testsuite/77317

gcc/testsuite/gcc.c-torture/execute/pr71083.c

+__extension__ typedef __UINT32_TYPE__ uint32_t;
+
 struct lock_chain {
-  unsigned int irq_context: 2,
+  uint32_t irq_context: 2,
     depth: 6,
     base: 24;
 };

gcc/testsuite/gcc.dg/zero_sign_ext_test.c

@@ -2,6 +2,7 @@ extern void abort (void);
 
 /* { dg-options "-O2" } */
 /* { dg-do run } */
+/* { dg-require-effective-target int32plus } */
 
 #define TYPE_MAX(type, sign)	\
   ((!sign) ? ((1 << (sizeof (type) * 8 - 1)) - 1) :	\