Bump bootstrap compiler to beta 1.53.0#84985

Merged

bors merged 3 commits intorust-lang:masterfrom

pietroalbini:bootstrap-1.54

May 25, 2021

Commits on May 24, 2021

bootstrap from 1.54.0 beta

pietroalbini
authored and
Mark-Simulacrum
committed
Bootstrap: skip rustdoc fingerprint for building docs.

ehuss
authored and
Mark-Simulacrum
committed
remove cfg(bootstrap)

pietroalbini
authored and
Mark-Simulacrum
committed