[Libguestfs] [PATCH v2 0/2] Use -bios bios-fast.bin where supported.

[Richard W.M. Jones]

This commit uses -bios bios-fast.bin if available, which basically
stops SeaBIOS from trying to do PCI probing during boot, which is a
waste of time when using the -kernel option.

v1 -> v2:

 - Rebase on top of Pino's work.

This still has 3 dependencies:

 - The qemu memoization work (v2).

 - Support for '-L ?' in qemu:
   https://lists.gnu.org/archive/html/qemu-devel/2016-05/threads.html#02596

 - Support for bios-fast.bin in qemu:
   https://lists.gnu.org/archive/html/qemu-devel/2016-05/threads.html#02408

Rich.