Inherit themes_common like we're supposed to

Summary: we were building packages. Why?

Test Plan: merge

Reviewers: synergy, anders3408, jriordan001, raymanfx, donald.munn

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D166
Merge branch 'kk-devel' of git://github.com/codefireXperiment/vendor_cfx into kk-devel