Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - enlarge the time of link down

    Change-Id: I063d7ba9b3eb8999cb2b08e7c6deca2644eb169e
    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 1351038..0f607cb 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 1351038a65739b8d799820de515178326ad05f7b
+Subproject commit 0f607cb5efd91ee497346b7f792dfa844d15595c