Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - 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>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index baac657..2ca5924 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit baac6579556f8216b36db0d0f87f9c2d4f8b4ef5
+Subproject commit 2ca5924081ce4784f599437707bd32807aa155ce