[PATCH] Some Python 3 fixes

[Joel Brobecker]

> > gdb/ChangeLog:
> > 
> > 	* python/lib/gdb/command/unwinders.py: Add parentheses.
> > 
> > gdb/testsuite/ChangeLog:
> > 
> > 	* gdb.python/py-framefilter.py (ErrorFilter.filter): Use map function
> > 	if itertools.imap is not present.
> > 	* gdb.python/py-objfile.exp: Add parentheses.
> > 	* gdb.python/py-type.exp: Same.
> > 	* gdb.python/py-unwind-maint.py: Same.

Sorry for the delay, Simon. Most of those are on the obvious side
(print being a function, now, and thus requiring the use of
parentheses), so they'd be OK to push without approval. The one
change that is less obvious is the adjustment after itertools.imap
got replaced by "map"; but the change looks good to me.

So go ahead and push.

-- 
Joel