mruby: build vendor/ before lib/
mruby: build vendor/ before lib/

Mruby is required to build before lib/ because lib/libgroonga.so
requires libmruby.

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