Another 3 debug hooks

[Neil Booth]

Richard Henderson wrote:-

> > +static bool dwarf2out_ignore_block	PARAMS ((tree));
> > +static void dwarf2out_abstract_function PARAMS ((tree));
> 
> You forgot to mark these static at the definition.

Thanks; one wasn't the other was OK.

What do you think about merging dbxout.c and xcoffout.c?  They're both
fairly small, share a bunch of stuff anyway, and it'll cut out a lot
of header file exporting.

Neil.