Fix bad fboss cmake file
Fix bad fboss cmake file

Summary: This was introduced by a previous diff when optic.thrift got mostly moved into transceiver.thrift

Reviewed By: luismartingarcia

Differential Revision: D4218671

fbshipit-source-id: a0bd03d225dbdab7dfef0efb6111b5e1b8094a82

peterlei/fboss,peterlei/fboss,peterlei/fboss,peterlei/fboss