getdeps: update the python wheel builder to support dependencies
getdeps: update the python wheel builder to support dependencies

Summary:
Correctly emit dependency information when one Python package depends on
another.

Reviewed By: wez

Differential Revision: D17669620

fbshipit-source-id: f51c7851470fe50dc0c17263c94c4d858d6e0921

facebookincubator/mvfst,facebookincubator/mvfst,facebookincubator/mvfst,facebookincubator/mvfst,facebookincubator/mvfst