Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Check external network

    Change-Id: I1ff199fcad99aefccb92807c8f416d4f32ec91a6
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a62233a..f846018 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a62233a19e60ca2c13bcbf0f477a0652842c89b6
+Subproject commit f8460182ebb264212f395e873594f84d41963243