p2v: Test two disk guest.

Make the test harder (evil grin).
recipes: Tidy up section about hex-dumping and hex-editing sectors.
mllib: Use automake to build the library.
sysprep: Use automake to build the library.

Normally this requires the program to have at least one C source file.
virt-sysprep doesn't have this, but it uses C sources from other
directories, and therefore we can make it work.