appveyor: try to install missing files (#981)
appveyor: try to install missing files (#981)


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