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/random

diff --git a/include/random b/include/random
index e925f6d..5de738a 100644
--- a/include/random
+++ b/include/random
@@ -2685,10 +2685,10 @@
     discard_block_engine() : __n_(0) {}
     explicit discard_block_engine(const _Engine& __e)
         : __e_(__e), __n_(0) {}
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit discard_block_engine(_Engine&& __e)
         : __e_(_STD::move(__e)), __n_(0) {}
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit discard_block_engine(result_type __sd) : __e_(__sd), __n_(0) {}
     template<class _Sseq> explicit discard_block_engine(_Sseq& __q,
         typename enable_if<!is_convertible<_Sseq, result_type>::value &&
@@ -2872,10 +2872,10 @@
     independent_bits_engine() {}
     explicit independent_bits_engine(const _Engine& __e)
         : __e_(__e) {}
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit independent_bits_engine(_Engine&& __e)
         : __e_(_STD::move(__e)) {}
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit independent_bits_engine(result_type __sd) : __e_(__sd) {}
     template<class _Sseq> explicit independent_bits_engine(_Sseq& __q,
         typename enable_if<!is_convertible<_Sseq, result_type>::value &&
@@ -3080,10 +3080,10 @@
     shuffle_order_engine() {__init();}
     explicit shuffle_order_engine(const _Engine& __e)
         : __e_(__e) {__init();}
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit shuffle_order_engine(_Engine&& __e)
         : __e_(_STD::move(__e)) {__init();}
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit shuffle_order_engine(result_type __sd) : __e_(__sd) {__init();}
     template<class _Sseq> explicit shuffle_order_engine(_Sseq& __q,
         typename enable_if<!is_convertible<_Sseq, result_type>::value &&