add bare metal ARM Cortex-A targets to rustc#68253

Merged

bors merged 3 commits intorust-lang:masterfrom japaric:bare-metal-cortex-a

Jan 23, 2020

+93

Commits on Jan 15, 2020

add bare metal ARM Cortex-A targets to rustc
japaric
committed

Commits on Jan 20, 2020

Merge branch 'master' into bare-metal-cortex-a
japaric
authored

Commits on Jan 21, 2020

for now, do not build rust-std for the armv7a-none-eabihf target
japaric
committed