PATCH to fix g++.dg/cpp0x/fallthrough2.C

[Marek Polacek]

This test failed with make check-c++1z because in C++1z we don't get the
expected message.

Bootstrapped/regtested on x86_64-linux, applying to trunk.

2016-09-29  Marek Polacek  <pola...@redhat.com>

        * g++.dg/cpp0x/fallthrough2.C: Only expect the warning in C++11 and
        C++14.

diff --git gcc/testsuite/g++.dg/cpp0x/fallthrough2.C 
gcc/testsuite/g++.dg/cpp0x/fallthrough2.C
index b6964e1..71c4a4f 100644
--- gcc/testsuite/g++.dg/cpp0x/fallthrough2.C
+++ gcc/testsuite/g++.dg/cpp0x/fallthrough2.C
@@ -11,7 +11,7 @@ f (int i)
     {
     case 1:
       bar (1);
-      [[fallthrough]]; // { dg-warning ".fallthrough. is a C\\+\\+17 feature" }
+      [[fallthrough]]; // { dg-warning ".fallthrough. is a C\\+\\+17 feature" 
"" { target { ! c++1z } }  }
     case 3:
       bar (1);
       [[gnu::fallthrough, gnu::fallthrough]]; // { dg-warning ".fallthrough. 
attribute specified multiple times" }

        Marek