packages windows: use UTF-8 for language file encoding
packages windows: use UTF-8 for language file encoding

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