Add crashpad_database_util and its man page

tools/mac/run_with_crashpad.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 65 matching lines @@
     kOptionLastChar = 255,
     kOptionAnnotation,
     kOptionDatabase,
     kOptionURL,
 
     // Standard options.
     kOptionHelp = -2,
     kOptionVersion = -3,
   };
 
-  const struct option long_options[] = {
+  const option long_options[] = {
       {"handler", required_argument, nullptr, kOptionHandler},
       {"annotation", required_argument, nullptr, kOptionAnnotation},
       {"database", required_argument, nullptr, kOptionDatabase},
       {"url", required_argument, nullptr, kOptionURL},
       {"argument", required_argument, nullptr, kOptionArgument},
       {"help", no_argument, nullptr, kOptionHelp},
       {"version", no_argument, nullptr, kOptionVersion},
       {nullptr, 0, nullptr, 0},
   };
 
@@ skipping 85 matching lines @@
   PLOG(ERROR) << "execvp " << argv[0];
   return errno == ENOENT ? kExitExecENOENT : kExitExecFailure;
 }
 
 }  // namespace
 }  // namespace crashpad
 
 int main(int argc, char* argv[]) {
   return crashpad::RunWithCrashpadMain(argc, argv);
 }