Allow std::pair test to run in C++11 mode too

	* testsuite/20_util/pair/astuple/get_neg.cc: Use effective-target
	c++11 instead of setting -std=gnu++14.

From-SVN: r238925

libstdc++-v3/ChangeLog

 2016-07-31  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/20_util/pair/astuple/get_neg.cc: Use effective-target
+	c++11 instead of setting -std=gnu++14.
+
 	PR libstdc++/72745
 	* include/std/array (get): Use positive message for static assertions.
 	* include/std/functional (_Safe_tuple_element_t): Fix indentation.

libstdc++-v3/testsuite/20_util/pair/astuple/get_neg.cc

-// { dg-do compile }
-// { dg-options "-std=gnu++14" }
+// { dg-do compile { target c++11 } }
 
 // Copyright (C) 2013-2016 Free Software Foundation, Inc.
 //