rumprun composite build notes...

Platform specific makefiles are located within rumprun/platform/ Composites would be: rumprun/platform/cos/makefile

Makefile needs to include: ../../config.mk ../../global.mk ../Makefile.inc config.mk

Copy most of the structuring of the hw makefile, be sure to add cos platform to the list of supported platforms.

All core libraries (those within rumprun/lib) need to be a cos sub directory.

The rumprun/platform/cos directory needs to have the correct sub-directories already in place before calling make. See rumpkernel rumprun repo for the default directories.