prepare 1:57.1-2 release
prepare 1:57.1-2 release

tianon/debian-golang,nightlyone/golang,tianon/debian-golang,bdwalton/debian-golang,nightlyone/golang,bdwalton/debian-golang,bdwalton/debian-golang,tianon/debian-golang,nightlyone/golang,nightlyone/golang,bdwalton/debian-golang,tianon/debian-golang,tianon/debian-golang,tianon/debian-golang,bdwalton/debian-golang,nightlyone/golang,nightlyone/golang,bdwalton/debian-golang,bdwalton/debian-golang,tianon/debian-golang,tianon/debian-golang,nightlyone/golang,bdwalton/debian-golang