Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Merge "PDF is not to contain net_config"
  - PDF is not to contain net_config

    Moved net_config from PDF to IDF for discussion on what the idf should look like

    The PDF spec is static and should not change.

    All changes needed for installers should be put in other descriptor files.
    (senario and installer descriptor files)

    Change-Id: I79f6c751cabc69bded255ce0471e8512c656c259
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index a77a121..ac7773d 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit a77a12161028d9f4c218949ec328c7b7a3fe0325
+Subproject commit ac7773d88a884af71b446823e07ce7be4a137838