Add a clang tool to detect std::move(raw ptr)

tools/clang/move_raw/tests/test-original.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+namespace std {
+
+// This is the move that should be flagged. Representes the unary std::move.
+template <typename T>
+T move(T t) {
+  return t;
+}
+
+// This represents the algorithm std::move, it should not be flagged.
+template <class InputIt, class OutputIt>
+OutputIt move(InputIt first, InputIt last, OutputIt d_first) {
+  return d_first;
+}
+
+}  // namespace std
+
+// This represents some non-std move. It should not be flagged.
+template <typename T>
+T move(T t) {
+  return t;
+}
+
+void Test() {
+  int x = 3;
+
+  // Should not be flagged: x is not a pointer.
+  int y = std::move(x);
+
+  int* p = &x;
+
+  // Calling std::move on a raw pointer should be flagged.
+  int* q = std::move(p);
+
+  // Calling non-std move should not be flagged.
+  q = move(p);
+}