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

include/mutex

@@ -456,7 +456,7 @@ class __call_once_param
 {
     _F __f_;
 public:
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit __call_once_param(_F&& __f) : __f_(_STD::move(__f)) {}
 #else
     explicit __call_once_param(const _F& __f) : __f_(__f) {}