[PATCH] Add dg-require-atomic-builtins to test

[Jonathan Wakely]

        PR libstdc++/71081
        * testsuite/experimental/memory_resource/1.cc: Require atomics.

Don't run the test on targets that need libatomic for accessing the
default memory resource. Tested x86_64-linux, committed to trunk.

commit ad31ffda12215c1934c9c3a99092e55f7344239b
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Thu May 12 14:06:22 2016 +0100

    Add dg-require-atomic-builtins to test
    
        PR libstdc++/71081
        * testsuite/experimental/memory_resource/1.cc: Require atomics.

diff --git a/libstdc++-v3/testsuite/experimental/memory_resource/1.cc 
b/libstdc++-v3/testsuite/experimental/memory_resource/1.cc
index 38cbd27..22d4e0d 100644
--- a/libstdc++-v3/testsuite/experimental/memory_resource/1.cc
+++ b/libstdc++-v3/testsuite/experimental/memory_resource/1.cc
@@ -1,4 +1,5 @@
 // { dg-options "-std=gnu++14" }
+// { dg-require-atomic-builtins }
 
 // Copyright (C) 2015-2016 Free Software Foundation, Inc.
 //