target_op(..) -> target_op(target, ...) obvious

[Andrew Cagney]

As part of the on-going OO of GDB, the "target vector" is one of the 
next things up for treatment.  I'd like to be sure that everyones ok 
with the mechanical transformatioin:

	target_OP (...) -> taget_OP (target, ...)

being considered "fairly obvious" (post patch, give it a few days, 
commit patch).  Pushing the target around is going to involve touching 
files across maintenance boundraries.

thoughts?
Andrew