make.sh: misc adjustments to build:
make.sh: misc adjustments to build:

- apply stand-alone define to entire build
- add support for a default make argument (e.g. allowing a target to build payload only)
- expand make payload to do everything except the final loader build

gale320/lambdanative,VincentToups/lambdanative,emacstheviking/lambdanative,youprofit/lambdanative,VincentToups/lambdanative,attila-lendvai/lambdanative,gale320/lambdanative,youprofit/lambdanative,gale320/lambdanative,VincentToups/lambdanative,attila-lendvai/lambdanative,attila-lendvai/lambdanative,attila-lendvai/lambdanative,attila-lendvai/lambdanative,VincentToups/lambdanative,gale320/lambdanative,VincentToups/lambdanative,emacstheviking/lambdanative,emacstheviking/lambdanative,youprofit/lambdanative,emacstheviking/lambdanative,emacstheviking/lambdanative,gale320/lambdanative,youprofit/lambdanative,youprofit/lambdanative