Update toolchain used to build rustup#741

Merged

brson merged 2 commits intorust-lang:masterfrom brson:update-toolchain

Nov 16, 2016

+3-3

Commits on Nov 12, 2016

Update toolchain used to build rustup
brson
committed

Commits on Nov 15, 2016

msi-installed isn't a valid feature of rustup-dist
brson
committed