Added some additional top-level Makefile targets for ease of use
Added some additional top-level Makefile targets for ease of use

`make onl-powerpc` makes components + installer + swi

shengzhou/ONL,JS-Wang/ONL,audihsu-qci/ONL,InterfaceMasters/ONL,jeankuo/ONL,jeankuo/ONL,shengzhou/ONL,iamyaw/ONL,capveg/ONL,InterfaceMasters/ONL,iamyaw/ONL,audihsu-qci/ONL,capveg/ONL,JS-Wang/ONL