Restore <functional> header to test

	* testsuite/experimental/array/make_array.cc: Restore <functional>
	inclusion.

From-SVN: r244840

libstdc++-v3/ChangeLog

+2017-01-23  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/experimental/array/make_array.cc: Restore <functional>
+	inclusion.
+
 2017-01-23  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	* testsuite/29_atomics/atomic/69301.cc: Require atomic builtins.

libstdc++-v3/testsuite/experimental/array/make_array.cc

@@ -18,6 +18,7 @@
 // <http://www.gnu.org/licenses/>.
 
 #include <experimental/array>
+#include <functional> // for std::ref and std::reference_wrapper
 
 struct MoveOnly
 {