Modify the creates statement so that the duo compilation will look in the chef cache path

Modifying the creates statement here will make upgrading login_duo much
easier. Instead of compiling login_duo only under the condition that a
configuration file has been created, the bash resource now looks to the
Chef::Config file cache path for the latest compiled version of
login_duo.
Change the auto generated message
Update the login_duo version to 1.9.11