Revert "[nfkc] removed needless NO_NFKC."
Revert "[nfkc] removed needless NO_NFKC."

This reverts commit e437bc502bdf95e7cba178abe9b6d9221b37ff8d.

groonga/groonga,naoa/groonga,cosmo0920/groonga,redfigure/groonga,komainu8/groonga,groonga/groonga,redfigure/groonga,cosmo0920/groonga,redfigure/groonga,redfigure/groonga,redfigure/groonga,groonga/groonga,redfigure/groonga,hiroyuki-sato/groonga,komainu8/groonga,redfigure/groonga,komainu8/groonga,kenhys/groonga,komainu8/groonga,redfigure/groonga,komainu8/groonga,hiroyuki-sato/groonga,komainu8/groonga,komainu8/groonga,cosmo0920/groonga,naoa/groonga,hiroyuki-sato/groonga,komainu8/groonga,groonga/groonga,kenhys/groonga,groonga/groonga,kenhys/groonga,naoa/groonga,naoa/groonga,myokoym/groonga,kenhys/groonga,cosmo0920/groonga,cosmo0920/groonga,hiroyuki-sato/groonga,hiroyuki-sato/groonga,myokoym/groonga,myokoym/groonga,kenhys/groonga,groonga/groonga,myokoym/groonga,groonga/groonga,hiroyuki-sato/groonga,naoa/groonga,myokoym/groonga,kenhys/groonga,naoa/groonga,groonga/groonga,kenhys/groonga,cosmo0920/groonga,kenhys/groonga,naoa/groonga,myokoym/groonga,myokoym/groonga,hiroyuki-sato/groonga,myokoym/groonga,naoa/groonga,hiroyuki-sato/groonga,cosmo0920/groonga,cosmo0920/groonga