[committed] Fix m68k testcase for c99

More fallout from the c99 conversion.   The m68k specific test pr63347.c calls
exit and abort without a prototype in scope.  This patch turns them into
__builtin calls avoiding the error.

Bootstrapped and regression tested on m68k-linux-gnu, pushed to the trunk.

gcc/testsuite
	* gcc.target/m68k/pr63347.c: Call __builtin_abort and __builtin_exit
	instead of abort and exit.

gcc/testsuite/gcc.target/m68k/pr63347.c

@@ -32,13 +32,13 @@ int main(int argc, char *argv[])
     myaddr = 0x0;
     ret = print_info(&myaddr);
     if (!ret)
-        abort ();
+        __builtin_abort ();
 
     myaddr = 0x01020304;
     ret = print_info(&myaddr);
     if (ret)
-        abort ();
-    exit (0);
+        __builtin_abort ();
+    __builtin_exit (0);
 }