Update compile-extensions to point to master
Update compile-extensions to point to master

Sing-Li/go-buildpack,Sing-Li/go-buildpack,hpcloud/go-buildpack,Sing-Li/go-buildpack,loafoe/go-buildpack,venicegeo/go-pdal-buildpack,half-ogre/go-buildpack,half-ogre/go-buildpack,virtmerlin/go-buildpack,stevenwilkin/go-buildpack,venicegeo/go-pdal-buildpack,venicegeo/go-pdal-buildpack,Sing-Li/go-buildpack,Jonty/go-buildpack,Sing-Li/go-buildpack,virtmerlin/go-buildpack,Sing-Li/go-buildpack,stevenwilkin/go-buildpack,hpcloud/go-buildpack,half-ogre/go-buildpack,stevenwilkin/go-buildpack,cloudfoundry/go-buildpack,hpcloud/go-buildpack,cloudfoundry/go-buildpack,cloudfoundry/go-buildpack,Jonty/go-buildpack,loafoe/go-buildpack,Jonty/go-buildpack,Sing-Li/go-buildpack,Sing-Li/go-buildpack,virtmerlin/go-buildpack,loafoe/go-buildpack