TT#53673 Update Debian packaging to make lintian happy

Fix badly formatted trailer line which lintian
complains about (the package-has-long-file-name
issue will be taken care of as TT#53577).

Change-Id: I8fac9d7f427793dd179c6676995cf7e97e60d582

debian/changelog

@@ -295,4 +295,4 @@ ngcp-csc-ui (6.0.0.0+0~mr6.0.0.0) unstable; urgency=medium
 
   * Initial revision
 
- -- Sergii Kipot <skipot@sipwise.com> Tue, 3 Oct 2017 17:00:00 +0200
+ -- Sergii Kipot <skipot@sipwise.com>  Tue, 3 Oct 2017 17:00:00 +0200