Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Add admin external network mapping for daisy

    The admin external network mapping is used by post deploy script
    in daisy to create network.

    Change-Id: I4bdde9ca52d8932f77e91b8bf7d41b0c2e821a20
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index ac2b2bd..fca5170 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit ac2b2bdddb422cbaceaf4fb3c4139dd44f8fa02e
+Subproject commit fca5170e5fcd04f0fac626699cca55757b5f9ed9