Move SWI case defs and flag defs.

	modified:   src/include/libmoxie-opcode.h
		SWI flag defs and case defs moved here

	modified:   src/libmoxie/moxie.c
		relocate SWI flag and case defs
SWI fixes, changes and additions

	modified:   src/libmoxie/moxie.c
		add MOXIE_SYS_CLOSE...  not present in gdb sim.
		add empty macro to check set errno at later date.
			pending further information.
		change physical numbers to psudo register refs.