Update re2

third_party/re2/testinstall.cc

 // Copyright 2008 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 <re2/re2.h>
 #include <re2/filtered_re2.h>
 #include <stdio.h>
 
 using namespace re2;
 
 int main(void) {
         FilteredRE2 f;
         int id;
         f.Add("a.*b.*c", RE2::DefaultOptions, &id);
         vector<string> v;
         f.Compile(&v);
+        vector<int> ids;
+        f.FirstMatch("abbccc", ids);
 
         if(RE2::FullMatch("axbyc", "a.*b.*c")) {
                 printf("PASS\n");
                 return 0;
         }
         printf("FAIL\n");
         return 2;
 }