Update git submodules

* Update docs/submodules/doctor from branch 'stable/gambia'
  - Fix SSH client connection reset

    SSH connection might be reseted with long running session.
    This may happen if run "testcase=all"

    Change-Id: I232ae906628411dfbe0bbdbdc8d4fb43167760fd
    Signed-off-by: Tomi Juvonen <tomi.juvonen@nokia.com>
    (cherry picked from commit 2ca5924081ce4784f599437707bd32807aa155ce)

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 9e012b8..aeb3941 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 9e012b87f560fe13f8cc63a21321a4f0c2efa1b0
+Subproject commit aeb3941f7353fee57b42d50163e76fa14db4faf9