build: support specifying what to build as arguments
build: support specifying what to build as arguments

glevand/coreos--mantle,marineam/mantle,mjg59/mantle,quantum/coreos-mantle,marineam/mantle,mischief/mantle,dm0-/mantle,glevand/coreos--mantle,quantum/coreos-mantle,mjg59/mantle,mischief/mantle,dm0-/mantle