Update changelog for 1.1.2.

debian/changelog

-tails (1.1.2) UNRELEASED; urgency=medium
+tails (1.1.2) unstable; urgency=medium
 
-  * Dummy changelog entry, replace me with actualy changes!
+  * Security fixes
+    - Upgrade the web browser to 24.8.0esr-0+tails3~bpo70+1
+      (fixes Mozilla#1064636).
+    - Install Linux 3.16-1 from sid (Closes: #7886).
 
- -- Tails developers <tails@boum.org>  Tue, 23 Sep 2014 22:53:45 -0700
+ -- Tails developers <tails@boum.org>  Tue, 23 Sep 2014 23:01:40 -0700
 
 tails (1.1.1) unstable; urgency=medium