release: Prepare the 0.8.2 release

I have kind of used 0.8.1 by accident already so let us move
to 0.8.2 now.
diff --git a/debian/changelog b/debian/changelog
index 0030462..5f4f269 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,10 +1,10 @@
-libosmocore (0.8.1+git2) UNRELEASED; urgency=medium
+libosmocore (0.8.2) unstable; urgency=medium
 
   * Add endian header
   * GPRS flow control changes
   * Add APN format routines to libosmocore.
 
- -- Holger Hans Peter Freyther <holger@moiji-mobile.com>  Thu, 16 Apr 2015 21:23:24 +0200
+ -- Holger Hans Peter Freyther <holger@moiji-mobile.com>  Sat, 01 Aug 2015 20:18:45 +0200
 
 libosmocore (0.8.0) unstable; urgency=medium