Stable backports for 1.43.1#71774

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cuviper wants to merge 4 commits intorust-lang:stablefrom

cuviper:stable-1.43.1

Commits on May 1, 2020

update openssl-src to 1.1.1g

emilyalbini
authored and
cuviper
committed
Update stdarch submodule

Amanieu
authored and
cuviper
committed
Add a shim from llvm_asm! to asm! for stdarch
cuviper
committed
1.43.1 release
cuviper
committed