remove useless make file build/mif/binname.mif
review cg build targets, hosts and types
review as build targets, hosts and types
review cc build targets, hosts and types
review cfloat build hosts and types
review dwarf/dw build hosts and types
review nwlib build hosts and types
review owl build hosts and types
review rc build hosts and types
review wl build  hosts and types
review plusplus build targets, hosts and types