[Darwin, PPC, testsuite, committed] Fix spec-barr-1.c for Darwin.

[Iain Sandoe]

We just needed to adjust the regex to accept Darwin's register names.

tested on powerpc-darwin9, powerpc-linux-gnu,
applied to mainline
thanks
Iain

2019-06-24  Iain Sandoe  <i...@sandoe.co.uk>

        * gcc.target/powerpc/spec-barr-1.c: Adjust scan assembler regex
        to recognise Darwin's register names.

diff --git a/gcc/testsuite/gcc.target/powerpc/spec-barr-1.c 
b/gcc/testsuite/gcc.target/powerpc/spec-barr-1.c
index a22bf58..d837515 100644
--- a/gcc/testsuite/gcc.target/powerpc/spec-barr-1.c
+++ b/gcc/testsuite/gcc.target/powerpc/spec-barr-1.c
@@ -6,4 +6,4 @@ void foo ()
   __builtin_ppc_speculation_barrier ();
 }
 
-/* { dg-final { scan-assembler "ori 31,31,0" } } */
+/* { dg-final { scan-assembler {ori\s+r?31,r?31,r?0} } } */