merge revision(s) 67006: [Backport #15469]
Ignore to add bundler lib direcotry if it is same as rubylibdir. [Bug #15469][ruby-core:90742]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67179 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 67006: [Backport #15469]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67179 b2dd03c8-39d4-4d8f-98ff-823fe69b080e