Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[doc] installation guide update: PDF section"
  - [doc] installation guide update: PDF section

    Update PDF section to:
    1. describe "net_config" section in IDF.
    2. describe compute parameterizaion required in IDF for
       both DPDK and non-DPDK scenario.

    JIRA: ARMBAND-361

    Change-Id: I63fbe79c5cc3a4ee5244e6a0efad57eb89aad7d2
    Signed-off-by: ting wu <ting.wu@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index b3b4b2e..10a3680 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit b3b4b2e1bcd42f4628e53796c3dab81151f56bc2
+Subproject commit 10a36807bc6ec0db532a93f6dbb2b42ec1c47617