xf86-input-vmmouse: bump version to 12.6.6

There was a bug in 12.6.5 whereby it was depending on symbols no longer
available in the X server.

Signed-off-by: Joshua Lock <josh@linux.intel.com>

diff --git a/meta/packages/xorg-driver/xf86-input-vmmouse_12.6.5.bb b/meta/packages/xorg-driver/xf86-input-vmmouse_12.6.6.bb
similarity index 100%
rename from meta/packages/xorg-driver/xf86-input-vmmouse_12.6.5.bb
rename to meta/packages/xorg-driver/xf86-input-vmmouse_12.6.6.bb