GDB 6.2.1 for testing

[Joerg Sonnenberger]

Hi all,
GDB 6.2.1 is now in the tree for testing. It is not hooked into
buildworld yet, but you can do a "make obj; make depend all install"
from gnu/usr.bin/gdb to install it. Optionally set GDB_TUI to include
to the Text User Interface, but it seems to have some bugs WRT
screen update.

I'm most interested in reports of threaded debugging and kernel debugging.
The former is untested by me and the later only lightly tested (bt seems
to work :) ).

Joerg