Upgrade Vendored rubyzip to Version 0.9.3

vendor/plugins/rubyzip/samples/write_simple.rb

@@ -0,0 +1,13 @@
+#!/usr/bin/env ruby
+
+$: << "../lib"
+
+require 'zip/zip'
+
+include Zip
+
+ZipOutputStream.open('simple.zip') {
+  |zos|
+  ze = zos.put_next_entry 'entry.txt'
+  zos.puts "Hello world"
+}