libpam-dev didn't exist for some people so switching to libpam0g-dev instead

roles/common/tasks/google_auth.yml

   apt: pkg={{ item }} state=present
   with_items:
     - libqrencode3
-    - libpam-dev
+    - libpam0g-dev
     #- libpam-google-authenticator    wasn't available in wheezy
 
 - name: Download Google authenticator pam module