Updates kvmx: 1cb78a9 Fix: turn spice support on by default

diff --git a/kvmx b/kvmx
index 7e104c572a52beb67017e594c5f3b1db5d307f64..1cb78a9fb76cb1b3f2c5c12acfbdc09ec0e17880 160000 (submodule)
--- a/kvmx
+++ b/kvmx
@@ -1 +1 @@
-Subproject commit 7e104c572a52beb67017e594c5f3b1db5d307f64
+Subproject commit 1cb78a9fb76cb1b3f2c5c12acfbdc09ec0e17880