tree b613c73b0c42aa5df54d1b9387c64a10e340997b
parent f003dca9b922cb7b010e7070b0a5254d4e531b64
author Michael Bolin <mbolin@fb.com> 1383776351 -0800
committer Michael Bolin <mbolin@fb.com> 1384307549 -0800

Replace some casts from BuildRule to Buildable with rule.getBuildable().

Summary:
I think that we needed these casts at one time, but now they are no
longer appropriate. Especially since more of our implementations of
`BuildRule` do not actually implement `Buildable`.

Test Plan: Sandcastle builds.