Added debugger support for the term gui using a pseudo-terminal. The command-line
debugger appears on main terminal and Bochs screen on pseudo-terminal connected
to minicom (based on SF patch #522).


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12571 6c8e4198-a580-4521-a02f-c9ae86df1db9