added backward compatibility symbols for libqc-opt.so

Summary: Change-Id: I196e913e642c25478933c9a873cd3198702ec0ae

Test Plan: better than a shared lib stub ;D

Reviewers: synergy, anders3408

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D405

Change-Id: Iabe7de36a9dad4bc669c046c7f2e784a1c42d3ae