Auto merge of #1721 - kzys:homu-auto, r=jtgeibel
Auto merge of #1721 - kzys:homu-auto, r=jtgeibel

Ignore auto instead of staging.tmp on Travis CI

Fixes #1603.

rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io