Changed __config to react to all of clang's currently documented has_feature flags, and renamed _LIBCPP_MOVE to _LIBCPP_HAS_NO_RVALUE_REFERENCES to be more consistent with the rest of the libc++'s flags, and with clang's nomenclature.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@113086 91177308-0d34-0410-b5e6-96231b3b80d8

test/input.output/iostream.format/input.streams/istream.rvalue/rvalue.pass.cpp

@@ -16,7 +16,7 @@
 #include <istream>
 #include <cassert>
 
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class CharT>
 struct testbuf
@@ -42,11 +42,11 @@ public:
     CharT* egptr() const {return base::egptr();}
 };
 
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 int main()
 {
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         testbuf<char> sb("   123");
         int i = 0;
@@ -59,5 +59,5 @@ int main()
         std::wistream(&sb) >> i;
         assert(i == 123);
     }
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }