To fix lintian warning

Index: gitlab/lib/support/init.d/gitlab
===================================================================
--- gitlab.orig/lib/support/init.d/gitlab
+++ gitlab/lib/support/init.d/gitlab
@@ -23,6 +23,9 @@
 # An example defaults file can be found in lib/support/init.d/gitlab.default.example
 ###
 
+### source init functions
+. /lib/init/vars.sh
+. /lib/lsb/init-functions
 
 ### Environment variables
 RAILS_ENV="production"