Avoid error in mk-origtargz by clearing Files-Excluded;

That also removes "+dfsg" part from version.

debian/changelog

@@ -1,3 +1,11 @@
+gitlab (11.6.0-2) UNRELEASED; urgency=medium
+
+  * Team upload.
+  * Moved list of files from Files-Excluded to "clean" file to avoid error
+    in `mk-origtargz`.
+
+ -- Dmitry Smirnov <onlyjob@debian.org>  Tue, 15 Jan 2019 18:47:47 +1100
+
 gitlab (11.6.0+dfsg-1) experimental; urgency=medium
 
   * New upstream version 11.6.0+dfsg

debian/clean

@@ -0,0 +1,3 @@
+lib/tasks/haml-lint.rake
+lib/tasks/rubocop.rake
+lib/tasks/scss-lint.rake

debian/copyright

@@ -2,9 +2,6 @@ Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: gitlab-ce
 Source: https://gitlab.com/gitlab-org/gitlab-ce
 Files-Excluded:
-    lib/tasks/haml-lint.rake
-    lib/tasks/rubocop.rake
-    lib/tasks/scss-lint.rake
 Comment: This package installs front end dependencies (nodejs modules) using
  npm/yarm package managers from outside debian. This can go to main when all
  those nodejs modules are packaged in main.