localeinit.c: cp on cygwin

* localeinit.c (SIZEOF_CP_NAME, CP_FORMAT): needed on cygwin too.

git-svn-id: svn+ssh://svn.ruby-lang.org/ruby/trunk@44708 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-01-26

git-svn-id: svn+ssh://svn.ruby-lang.org/ruby/trunk@44709 b2dd03c8-39d4-4d8f-98ff-823fe69b080e