Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - Remove obsolete packages

    `os` and `sys` is no longer used in sample monitor, inspector and consumer

    Change-Id: I6d2a6ccf1cd68851a80e6e6cf0c50bf06c8d1cbb
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 67a6a61..5455860 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 67a6a61f91696873917fccffd57d4a8423867392
+Subproject commit 545586015e5b768875672352afe77a5a850a9d86