package/qemu: replace old configure param with new equivalent

QEMU 6.0.0 replaces in [1] --(enable|disable)-git-update with
--with-git-submodules=(update|validate|ignore). "Disable" is now "ignore".

[1] https://lore.kernel.org/qemu-devel/20201016203857.62572-1-ddstreet@canonical.com/

Signed-off-by: Joseph Burt <caseorum@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
1 file changed