Directory structure problem for ruby/ruby

[hsbt]

I merged the current master branch to ruby/ruby repository. But the master branch was failed with make test-all caused by directory structure.

ruby/ruby#2603

I reverted the above commits manually. I'm going to investigate it. If you have any idea, Please fix this directory.

Thanks!

[hsbt]

This problem was fixed at

ruby/ruby#3265
#32

I will re-open this with reproducing this issue.