Rollup of 8 pull requests#62937

Closed

Centril wants to merge 51 commits intorust-lang:masterfrom

Centril:rollup-paqkujy

Commits on Jul 15, 2019

Commits on Jul 18, 2019

Add riscv32i-unknown-none-elf target
Disasm
committed

Commits on Jul 20, 2019

Don't link mcjit/interpreter LLVM components
nikic
committed

Commits on Jul 22, 2019

Commits on Jul 23, 2019

Require a value for configure --debuginfo-level
cuviper
committed

Commits on Jul 24, 2019