[committed] remove xfail from attr-nonstring-3.c

[Martin Sebor]

The test started passing with the fix for bug 88693 (r267852).
I've just removed the xfail via r268090  (copied below).  As
the original shows, the failure had been misdiagnosed and
mislabeled as due to the still unresolved bug 86688.
Martin

Index: gcc/testsuite/c-c++-common/attr-nonstring-3.c
===================================================================
--- gcc/testsuite/c-c++-common/attr-nonstring-3.c       (revision 268086)
+++ gcc/testsuite/c-c++-common/attr-nonstring-3.c       (working copy)
@@ -406,7 +406,7 @@ void test_strlen (struct MemArrays *p, char *s NON
   {
     char a[] __attribute__ ((nonstring)) = { 1, 2, 3 };

-    T (strlen (a));             /* { dg-warning "argument 1 declared 
attribute .nonstring." "pr86688" { xfail *-*-* } } */
+    T (strlen (a));             /* { dg-warning "argument 1 declared 
attribute .nonstring." } */
   }

   {