[rubygems/rubygems] Fix upgrading RubyGems with a customized Gem.default_dir
Gem.default_dir
https://github.com/rubygems/rubygems/commit/16d01f9486
[rubygems/rubygems] Fix upgrading RubyGems with a customized
Gem.default_dir
https://github.com/rubygems/rubygems/commit/16d01f9486