array: Add feature-test macro.

	* include/experimental/array: Add feature-test macro.
	* testsuite/experimental/array/neg.cc: Update dg-error.

From-SVN: r226893

libstdc++-v3/ChangeLog

+2015-08-14  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/experimental/array: Add feature-test macro.
+	* testsuite/experimental/array/neg.cc: Update dg-error.
+
 2015-08-13  Ville Voutilainen  <ville.voutilainen@gmail.com>
 
 	* testsuite/experimental/array/neg.s: Remove.

libstdc++-v3/include/experimental/array

@@ -47,6 +47,7 @@ inline namespace fundamentals_v2
 {
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
+#define __cpp_lib_experimental_make_array 201505
   /**
    * @defgroup make_array Array creation functions
    * @ingroup experimental

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

@@ -24,5 +24,5 @@ int main()
 {
   int dummy;
   auto bad = std::experimental::make_array(std::ref(dummy));
-  // { dg-error "make_array cannot be used without an explicit target type if any of the types given is a reference_wrapper" "" { target *-*-* } 76 }
+  // { dg-error "make_array cannot be used without an explicit target type if any of the types given is a reference_wrapper" "" { target *-*-* } 77 }
 }