[icu] Support loading data file from default location

src/snapshot/mksnapshot.cc

 // Copyright 2006-2008 the V8 project 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 <errno.h>
 #include <signal.h>
 #include <stdio.h>
 
 #include "include/libplatform/libplatform.h"
 #include "src/assembler.h"
@@ skipping 132 matching lines @@
   // flags or if the help flag is set.
   int result = i::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
   if (result > 0 || (argc > 3) || i::FLAG_help) {
     ::printf("Usage: %s --startup_src=... --startup_blob=... [extras]\n",
              argv[0]);
     i::FlagList::PrintHelp();
     return !i::FLAG_help;
   }
 
   i::CpuFeatures::Probe(true);
-  V8::InitializeICU();
+  V8::InitializeICUDefaultLocation(argv[0]);
   v8::Platform* platform = v8::platform::CreateDefaultPlatform();
   v8::V8::InitializePlatform(platform);
   v8::V8::Initialize();
 
   {
     SnapshotWriter writer;
     if (i::FLAG_startup_src) writer.SetSnapshotFile(i::FLAG_startup_src);
     if (i::FLAG_startup_blob) writer.SetStartupBlobFile(i::FLAG_startup_blob);
 
     char* embed_script = GetExtraCode(argc >= 2 ? argv[1] : NULL, "embedding");
@@ skipping 11 matching lines @@
     CHECK(blob.data);
     writer.WriteSnapshot(blob);
     delete[] blob.data;
   }
 
   V8::Dispose();
   V8::ShutdownPlatform();
   delete platform;
   return 0;
 }