debian: Re-enable the debug packages

Remove the .dirs/.install as things will go wrong then. debhelper
will try to install the debug symbols before they were created. Thanks
to Jan for pointing that out.
diff --git a/debian/changelog b/debian/changelog
index e6e44c7..c75070e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,7 @@
   * Build new package with the new API required for osmo-bts/openbsc
   * Package the arfcn utility.
   * Add the SOCK_RAW work-around for glibc.
+  * Re-enable the debug packages thanks to Jan.
 
  -- Holger Hans Peter Freyther <holger@freyther.de>  Fri, 04 Jan 2013 09:54:55 +0100