update to current ubuntu-mantic/master-next

to get some relevant fixes for our use cases, like hangs on reboots on
some x86_64 machines.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/submodules/ubuntu-kernel b/submodules/ubuntu-kernel
index 9c6c455875d461a99b2946d7b43803f60a414dee..67cc773d350984cd7fe77d26adb1f4f0fa434ebc 160000 (submodule)
--- a/submodules/ubuntu-kernel
+++ b/submodules/ubuntu-kernel
@@ -1 +1 @@
-Subproject commit 9c6c455875d461a99b2946d7b43803f60a414dee
+Subproject commit 67cc773d350984cd7fe77d26adb1f4f0fa434ebc