[icu] Support loading data file from default location

samples/hello-world.cc

Index: samples/hello-world.cc
diff --git a/samples/hello-world.cc b/samples/hello-world.cc
index 3b952d816b9b966a4f4e003c72dd1396883858d8..902d8d55461c673090c8661c125fcee34a2ba1e3 100644
--- a/samples/hello-world.cc
+++ b/samples/hello-world.cc
@@ -24,7 +24,7 @@ class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
 
 int main(int argc, char* argv[]) {
   // Initialize V8.
-  V8::InitializeICU();
+  V8::InitializeICUDefaultLocation(argv[0]);
   V8::InitializeExternalStartupData(argv[0]);
   Platform* platform = platform::CreateDefaultPlatform();
   V8::InitializePlatform(platform);