Auto merge of #587 - Manishearth:homuup, r=edunham
Auto merge of #587 - Manishearth:homuup, r=edunham

Bump homu to a7355eb7a2ce5deaab2610c24fa2f29573a27cf1

Must be landed before a deploy, since this fixes https://github.com/servo/homu/issues/86. Also implements tree closure.

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rwaweber/saltfs,servo/saltfs,UK992/saltfs,UK992/saltfs,UK992/saltfs,rwaweber/saltfs,servo/saltfs,rwaweber/saltfs,ALikhachev/saltfs,ALikhachev/saltfs,ALikhachev/saltfs