theme: Add packagekit edc to fix make distcheck
theme: Add packagekit edc to fix make distcheck

Adding it to EXTRA_DIST makes ure it gets packaged in the tarball
and is available for a plain tarball build.

FlorentRevest/Elementary,rvandegrift/elementary,tasn/elementary,FlorentRevest/Elementary,tasn/elementary,tasn/elementary,rvandegrift/elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,rvandegrift/elementary,tasn/elementary,rvandegrift/elementary,tasn/elementary