Rollup of 8 pull requests#54215

Merged

bors merged 32 commits intorust-lang:masterfrom

Sep 14, 2018

Commits on Aug 9, 2018

Commits on Aug 10, 2018

Also add a `From` implementation for `&mut Option<T>` -> `Option<&mut T>'
weiznich
committed

Commits on Sep 7, 2018

Fix compiling some rustc crates to wasm
alexcrichton
committed

Commits on Sep 12, 2018

Merge branch 'master' into kenta7777#53719
kenta7777
committed

Commits on Sep 14, 2018