Fix bug.

announcement.gemspec

@@ -6,10 +6,10 @@ require "announcement/version"
 require 'json'
 bundle_update_flag = ARGV[0]=='update' || ARGV[0]=='install'
 if bundle_update_flag
+  env_pwd = ENV['PWD']
   if File.exist?("#{env_pwd}/app/models/google.rb")
     system("rm -f #{env_pwd}/app/models/google.rb")
   end
-  env_pwd = ENV['PWD']
   app_path = File.expand_path(__dir__)
   template_path = env_pwd + '/app/templates'
   all_template = Dir.glob(template_path+'/*/')