Rework MIPS nop-insertion code, add -mfix-vr4130 [2/11]

[Eric Christopher]

> 
> 	* config/tc-mips.c (mips_cl_insn): Replace reloc_type array with
> 	a single mips16_absolute_jump_p bit.
> 	(append_insn): Adjust accordingly.

OK mainline and branch.

-eric