The ruby-2.7 tags will always contain the latest
patch released for that minor version.
This allows us to ship patches more easily but
retains backwards compatibility with existing
repos asking for 2.7.2.
These patches are necessary to fix https://bugs.ruby-lang.org/issues/17725
which is unreleased.
This is currently breaking our Ruby 3 build, so until 3.0.3 is out
let's apply these independently.