Rollup of 5 pull requests#61819

Closed

Centril wants to merge 11 commits intorust-lang:masterfrom

Centril:rollup-k2gprnz

Commits on Jun 11, 2019

Pass LLVM linker flags to librustc_llvm build
petrhosek
committed

Commits on Jun 13, 2019

Commits on Jun 14, 2019