Linux-PAM: Version bumped to 1.1.6

- Patch set updated
- pam_systemd.so has been added as an optional module to system-auth
- pam_console rules are no longer installed since systemd have taken over
  most of the device permission handling
Linux-PAM: optional is good enough for pam_systemd.so
Merge pull request #206 from Ratler/pam

Linux-PAM: Version bumped to 1.1.6