[RFC] print JUMP_LABEL for JUMP_INSN

[Andrew Pinski <pinskia at physics dot uc dot edu>]

I don't know why we did not print this before, but it is useful for 
debugging
an ICE in make_edges.

What do people think about this patch?  Is it something what people want
or not?  Or should it only be enabled with a flag?

An example of what it looks like:
(jump_insn:HI 2539 2830 2305 120 (set (pc)
        (reg:SI 66 ctr)) 482 {*indirect_jumpsi} (insn_list:REG_DEP_TRUE 
2537 (insn_list:REG_DEP_TRUE 2538 (insn_list:REG_DEP_TRUE 1498 (nil))))
    (insn_list:REG_LABEL 1504 (expr_list:REG_CROSSING_JUMP (nil)
            (nil)))
    (code_label:HI 1504 1503 1505 35 284 "" [2 uses]))


Thanks,
Andrew Pinski

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