fbcode_builder: add VERBOSE=1 to make invocations
fbcode_builder: add VERBOSE=1 to make invocations

Summary: This makes it easier to debug and diagnose build problems

Reviewed By: simpkins

Differential Revision: D13831342

fbshipit-source-id: 3921a05715fb00264b2e1a6e134686d68aea804d

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly