update sources to Ubuntu-4.15.0-36.39

(generated with debian/scripts/import-upstream-tag)

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

diff --git a/submodules/ubuntu-bionic b/submodules/ubuntu-bionic
index d5bad4136d14cda66cb7c06b10b80c64ae695c78..fd01374000c83b59d3ce234fbb970cb91404bd42 160000 (submodule)
--- a/submodules/ubuntu-bionic
+++ b/submodules/ubuntu-bionic
@@ -1 +1 @@
-Subproject commit d5bad4136d14cda66cb7c06b10b80c64ae695c78
+Subproject commit fd01374000c83b59d3ce234fbb970cb91404bd42