[config] make --<checker>-only actually work
[config] make --<checker>-only actually work

Summary: shamecube

Reviewed By: sblackshear

Differential Revision: D5754580

fbshipit-source-id: 1f8c770

jvillard/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer