Test failing at packman build for contbuild on wedge_agent
Test failing at packman build for contbuild on wedge_agent

Summary: agent was still trying to utilize fbmake to build it's rpm. Changed to buck.

Differential Revision: D4837868

fbshipit-source-id: 05f9ed4cb4074682d768ea134bc4753604addf28

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