Don't delete usr/share/local/kk_KZ.UTF-8 with "make delete-old" after r302329

kk_KZ.UTF-8 was originally removed in r290494, but restored as an alias to
en_US.UTF-8 in r302329

MFC after: 1 week
X-MFC with: r302329
PR: 211046
Reported by: dhw, O. Hartman <ohartman@zedat.fu-berlin.de>
Sponsored by: EMC / Isilon Storage Division