Unreviewed, rolling out r172866.
https://bugs.webkit.org/show_bug.cgi?id=136177

Broke iOS build (Requested by othermaciej on #webkit).

Reverted changeset:

"Replace use of WKCopyCFLocalizationPreferredName with
NSLocale public API"
https://bugs.webkit.org/show_bug.cgi?id=136082
http://trac.webkit.org/changeset/172866

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@172875 268f45cc-cd09-0410-ab3c-d52691b4dbfc