Updates kvmx: e42b295 Fix: missing netdev option for newer qemu versions

diff --git a/kvmx b/kvmx
index 515f71c62b767a543f0ab597be76b08203b91e6b..e42b295ef928e79cf17fcc39429ded27ea19a84a 160000 (submodule)
--- a/kvmx
+++ b/kvmx
@@ -1 +1 @@
-Subproject commit 515f71c62b767a543f0ab597be76b08203b91e6b
+Subproject commit e42b295ef928e79cf17fcc39429ded27ea19a84a