lguest: add PCI config space emulation to example launcher.
lguest: add PCI config space emulation to example launcher.

This handles ioport 0xCF8 and 0xCFC accesses, which are used to
read/write PCI device config space.

Signed-off-by: Rusty Russell <df9728c9e5104131c08c7adb03af425394842596@rustcorp.com.au>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs