Update re2

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
index 46f804b85332ac3b780c07a73cd01d017e3aa49f..19ec22ee1db5a2f32889d96515f579b0811d464a 100644
--- a/third_party/re2/util/valgrind.cc
+++ b/third_party/re2/util/valgrind.cc
@@ -3,15 +3,17 @@
 // license that can be found in the LICENSE file.
 
 #include "util/util.h"
+#ifndef _WIN32
 #include "util/valgrind.h"
+#endif
 
 namespace re2 {
 
-int RunningOnValgrind() {
+bool RunningOnValgrind() {
 #ifdef RUNNING_ON_VALGRIND
-	return RUNNING_ON_VALGRIND;
+  return RUNNING_ON_VALGRIND != 0;
 #else
-	return 0;
+  return false;
 #endif
 }