Fix warnings in array and assoc containers

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@242629 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/containers/sequences/array/array.tuple/get_rv.pass.cpp

@@ -11,14 +11,18 @@
 
 // template <size_t I, class T, size_t N> T&& get(array<T, N>&& a);
 
+// UNSUPPORTED: c++98, c++03
+
 #include <array>
 #include <memory>
 #include <utility>
 #include <cassert>
 
+#include "../suppress_array_warnings.h"
+
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
     {
         typedef std::unique_ptr<double> T;
         typedef std::array<T, 1> C;
@@ -26,5 +30,4 @@ int main()
         T t = std::get<0>(std::move(c));
         assert(*t == 3.5);
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }