gdb 7.6.2

Closes #258.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Update openssh.rb to use OpenSSH 6.4p1

Closes #251.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
openssh: remove patches

These patches no longer apply against 6.4p1, and their provenance is
unclear. Interested users can resubmit them if desired.