Modify configuration "polkit-1" in /etc/pam.d/ for supporting pam.
(From OE-Core rev: 6bc6406b019ebc104a4abfb15c2d2e1263968664)
Signed-off-by: Xiaofeng Yan <xiaofeng.yan@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>