Rollup of 12 pull requests#39567

Merged

bors merged 32 commits intorust-lang:masterfrom

frewsxcv:rollup

Feb 5, 2017

Commits on Feb 4, 2017

Use less syscalls in `FileDesc::set_{nonblocking,cloexec}`
tbu-
committed
Don't use "unadjusted" ABI on non windows platforms
est31
committed
run rustfmt for librustc/util/fs.rs
king6cong
committed
More snap cleanup
nagisa
committed
Unignore stage0/1 i128 tests as well
nagisa
committed
Uninhabited while-let pattern fix
canndrew
committed
Support a debug info API change for LLVM 4.0
Dylan McKay
committed
ignore more gdb versions with buggy rust support
TimNN
committed
Slightly optimize slice::sort
Stjepan Glavina
committed
Minor fix in the *_expensive benchmark
Stjepan Glavina
committed

Commits on Feb 5, 2017