Include RE2 library

third_party/re2/util/valgrind.cc

Index: third_party/re2/util/valgrind.cc
diff --git a/third_party/re2/util/valgrind.cc b/third_party/re2/util/valgrind.cc
new file mode 100644
index 0000000000000000000000000000000000000000..749bb59667304d276df0da3c3764a2b167c5bcad
--- /dev/null
+++ b/third_party/re2/util/valgrind.cc
@@ -0,0 +1,24 @@
+// 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