linux-pam: add security patches

To fix:
CVE-2013-7041 - use case sensitive comparison in pam_userdb
CVE-2014-2583 - potential path traversal issue in pam_timestamp

Also add hash file (computed, the hash files upstream cover up to 1.1.7)

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>