Update git submodules

* Update docs/submodules/kvmfornfv from branch 'master'
  - Merge "[fuel-plugin]Reduce kernel debian build duration"
  - [fuel-plugin]Reduce kernel debian build duration

    This patch contains some enhancement to reduce the kernel build
    duration by making use of all processors available.

    Change-Id: Ie14f871924f5c20784f2c2e30607ab549c94125f
    Signed-off-by: Navya Bathula <navyax.bathula@intel.com>

diff --git a/docs/submodules/kvmfornfv b/docs/submodules/kvmfornfv
index b6b08d2..4038e15 160000 (submodule)
--- a/docs/submodules/kvmfornfv
+++ b/docs/submodules/kvmfornfv
@@ -1 +1 @@
-Subproject commit b6b08d2a80b2df28e496ce87705593ed59b282a3
+Subproject commit 4038e157f640ad185d5469c146c8f0faf23dd3ec