Include RE2 library

third_party/re2/util/valgrind.cc

+// Copyright 2009 The RE2 Authors.  All Rights Reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "util/util.h"
+#include "util/valgrind.h"
+
+namespace re2 {
+
+static bool checkValgrind() {
+#ifdef RUNNING_ON_VALGRIND
+        return RUNNING_ON_VALGRIND;
+#else
+        return false;
+#endif
+}
+
+static const int valgrind = checkValgrind();
+
+int RunningOnValgrind() {
+  return valgrind;
+}
+
+}  // namespace re2