* cgen.h: New file.

	* cgen.h: New file.
	* cgen.c: Include it.
	(MAX_FIXUPS): Renamed to CGEN_MAX_FIXUPS.
	(cgen_asm_finish_insn): Result is now void.  New arg `result'.
	All callers updated.
	* config/tc-m32r.c: Include cgen.h.
	(m23r_insn): New members num_fixups,fixups.
	(assemble_parallel_insn): Initialize debug_sym_link for each insn.
	(md_assemble): Simplify code to pack two insns in parallel.
	When swapping two insns, update their fixups.