mruby: fix a typo in auto generated mruby-errno file path
mruby: fix a typo in auto generated mruby-errno file path

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