Reintroduce TEXT_CONSOLE_FIXED_SIZE and TEXT_CONSOLE for resizable vc's.

This partially reverts r4812 to fix an issue highlighted by Ryan Harper
with all vc's being fixed size which prevented backends with resizable
window (curses) from displaying okay.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5309 c046a42c-6fe2-441c-8c8c-71466251a162
