update to libbpf-0.3 in getdeps
update to libbpf-0.3 in getdeps

Summary: Allows us to use new APIs in libbpf

Reviewed By: anakryiko

Differential Revision: D25933787

fbshipit-source-id: f0988caae351760b814eba74f6f716db51f728bd

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