BUI

The install target for each subcomponent is already tied to the subcomponent compile target. These just need to be broken into their own targets so they work well under Buildroot.

Also, the BLDDIR and ARCDIR variables need to be configurable on the make command line (just make them overridden in the config.mk).

Also move the file listing of the install directory to their own targets for each subcomponent.

Link flags will be an issue. They are different for each subcomponent. I can either use a common set for all of them and override on the command line or try to set them on a per-component basis in the bui.mk file.

Added install and supporting targets. ARCDIR, BLDDIR and INSTALLDIR are now configurable from the command line. Used a common link flag (LDFLAGS) for all binaries which should work fine but is still to be verified on the running system.