Fix permissions of Updater binary under Ruby 1.9.x

When create-packages.rb was run under ruby 1.9.x the Updater
binary in the output dir lost its executable permissions.

This is the same issue and fix as previously applied in
0472a4e991

tools/create-packages.rb

@@ -385,7 +385,7 @@ if !updater_binary_input_path
 	exit(1)
 end
 
-FileUtils.cp(updater_binary_input_path,"#{output_dir}/#{File.basename(updater_binary_input_path)}")
+FileUtils.cp updater_binary_input_path, "#{output_dir}/#{File.basename(updater_binary_input_path)}", :preserve => true
 
 # output the file_list.xml file
 update_script = UpdateScriptGenerator.new(target_version,target_platform,input_dir,