Make all alt builders produce parallel-enabled compilers#64722

Merged

bors merged 2 commits intorust-lang:masterfrom

Mark-Simulacrum:alt-parallel

Oct 2, 2019

Commits on Sep 23, 2019

Make all alt builders produce parallel-enabled compilers
Mark-Simulacrum
committed

Commits on Sep 30, 2019

Make the default parallelism 1
Mark-Simulacrum
committed