Fix pr84711.c testcase

On powerpc64-linux, this testcase complains the ABI for vector args
has changed, making the testcase fail (excess output).  This patch
shuts up that warning.


	* gcc.dg/vect/pr84711.c: Use -Wno-psabi.

From-SVN: r268553

gcc/testsuite/ChangeLog

+2019-02-05  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* gcc.dg/vect/pr84711.c: Use -Wno-psabi.
+
 2019-02-05  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.target/powerpc/vec-extract-sint128-1.c: Require int128 effective

gcc/testsuite/gcc.dg/vect/pr84711.c

 /* { dg-do compile } */
 /* { dg-require-effective-target vect_int } */
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -Wno-psabi" } */
 /* { dg-additional-options "-msse" { target i?86-*-* x86_64-*-* } } */
 
 typedef int v4si