use libcurl in getdeps (#114)

[dgrnbrg-meta]

Summary: X-link: https://github.com/facebook/fboss/pull/114

X-link: https://github.com/facebook/fb303/pull/27

When using getdeps inside of a container, Python's urllib isn't able to download from dewey lfs (see this post for details https://fb.workplace.com/groups/systemd.and.friends/permalink/2747692278870647/).

This allows for getdeps to use libcurl to fetch dependencies, which allows for a getdeps build to work inside the container environment.

Reviewed By: mackorone

Differential Revision: D34696330

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D34696330