* dir.c (need_normalization): not only HFS+, CIFS (SMB) is also
decomposed. [Bug #10704]
* dir.c (NORMALIZE_UTF8PATH): Unicode decomposition seems to
perform in an upper layer than file systems on OSX, as all path
names are always decomposed regardless of file system types.
merge revision(s) 49168: [Backport #10700]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@49303 b2dd03c8-39d4-4d8f-98ff-823fe69b080e