Fix altivec-17.C to match current compiler error message

From-SVN: r178614

gcc/testsuite/ChangeLog

+2011-09-06  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	* g++.dg/ext/altivec-17.C: Fix dg-error to match current compiler.
+
 2011-09-06  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.c-torture/compile/20110906-1.c: New test.

gcc/testsuite/g++.dg/ext/altivec-17.C

@@ -12,5 +12,5 @@ typedef vector__ bool__ int bool_simd_type;
 
 void Foo (bool_simd_type const &a)
 {
-  simd_type const &v = a; // { dg-error "'const simd_type&' from expression of type 'const bool_simd_type'" }
+  simd_type const &v = a; // { dg-error "invalid initialization of reference of type" }
 }