NormalierNFKC100: unify after normalize
NormalierNFKC100: unify after normalize

It's changed from unifying while normalizing. The previous approach
doesn't support a case that changes the number of characters.

komainu8/groonga,kenhys/groonga,kenhys/groonga,komainu8/groonga,kenhys/groonga,naoa/groonga,kenhys/groonga,groonga/groonga,kenhys/groonga,naoa/groonga,groonga/groonga,naoa/groonga,groonga/groonga,kenhys/groonga,komainu8/groonga,groonga/groonga,naoa/groonga,komainu8/groonga,naoa/groonga,komainu8/groonga,groonga/groonga,komainu8/groonga,komainu8/groonga,kenhys/groonga,komainu8/groonga,naoa/groonga,kenhys/groonga,naoa/groonga,groonga/groonga,groonga/groonga,groonga/groonga,naoa/groonga