[Patch, testsuite, committed] Fix bogus pr78886.c for avr

[Senthil Kumar Selvaraj]

Hi,

  The test declares malloc with an unsigned long parameter. This causes
  a warning for avr, as it's size_t is only unsigned int.

  Fixed by typdef'ing __SIZE_TYPE__ to size_t and using it in the malloc
  function's declaration.

  Committed as obvious.

Regards
Senthil

gcc/testsuite/ChangeLog

2017-05-17  Senthil Kumar Selvaraj  <senthil_kumar.selva...@atmel.com>

        * gcc.dg/tree-ssa/pr78886.c: Use __SIZE_TYPE__ instead of
        unsigned long.

Index: gcc/testsuite/gcc.dg/tree-ssa/pr78886.c
===================================================================
--- gcc/testsuite/gcc.dg/tree-ssa/pr78886.c     (revision 248137)
+++ gcc/testsuite/gcc.dg/tree-ssa/pr78886.c     (working copy)
@@ -1,7 +1,9 @@
 /* { dg-do compile } */
 /* { dg-options "-O2" } */
-void *malloc(unsigned long x);
 
+__extension__ typedef __SIZE_TYPE__ size_t;
+void *malloc(size_t x);
+
 void foo(void)
 {
  volatile int i;