* cgen-cpu.h: Update for new location of cgen/bitset.h.

	* cgen-cpu.h: Update for new location of cgen/bitset.h.
	* tracedis.h: Ditto.

Plus update generated files to pick up two cgen changes:
1)
	* desc-cpu.scm (/gen-hash-defines): Remove #include of cgen-bitset.h.
	* sid-cpu.scm (cgen-desc.h): Update location of cgen's bitset.h.
2)
	* utils-sim.scm (/gen-set-itype-and-extract): New function.
	(/gen-bracketed-set-itype-and-extract): New function.
	(/gen-decode-default-entry): Rewrite.
	(/table-guts-to-mask, /all-opcode-bits-used?): New functions.
	(/gen-decode-insn-entry): New arg table-guts-thus-far, all callers
	updated.  Don't unnecessarily emit check for whether all opcode bits
	have been examined.
	(/gen-decode-expr-set-itype): Delete.
	(/gen-decode-expr-entry): Update.
	(/gen-decode-table-entry): New arg table-guts-thus-far, all callers
	updated.  Keep track of decoder tables used thus far.
	(/gen-decoder-switch): Ditto.