spice-protocol: Update to 0.14.3 and enable build without python2

spice-protocol: Update to 0.14.3 and enable build without python2

- v2 version adds $(MAKETUNING) variable to ninja build command
- Update from 0.12.13 to 0.14.3
- Update rootfile
- Remove automake py-compile line from lfs. This only works with python2
   Not clear why this line was put into the lfs. Searched the documentation of spice
   and qemu and could not find any reference to needing any of the python modules in spice
   to be installed either as modules or compiled in. The only references found in general
   searches were to modules such as python-virtinst, python-spice-client-gtk or
   python-websockify, none of which are in the python modules in spice.
- Removing the automake py-compile line from the lfs enables spice-protocol, spice and
   qemu to build without python2 being present.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>