Split generated insn-emit.c

[jiejie_rong@c-sky.com]

Hi,

	The size of generated file like insn-emit.c is very huge
	if we add lots of define_expand patten or define_insn patten.

	It’s present easily when there are much more intrinsic interfaces
	it costs much more time to create toolchain with compiling these files :(

	Does anyone have method to split the generated file to small pieces ?
	Or any hints to modify GCC toolchain creation process ?

Thanks,

—Jojo