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/thread/thread.threads/thread.thread.class/thread.thread.assign/move.pass.cpp

@@ -56,7 +56,7 @@ void f1()
 
 int main()
 {
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::set_terminate(f1);
     {
         assert(G::n_alive == 0);
@@ -78,5 +78,5 @@ int main()
         t0 = std::move(t1);
         assert(false);
     }
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }