Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - Merge "fix the way to get log filename"
  - fix the way to get log filename

    Change-Id: I9ce494c408c99e1a76a6b485db29a72c3134e487
    Signed-off-by: Ryota MIBU <r-mibu@cq.jp.nec.com>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 1bec48c..171f4b4 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 1bec48cd10057821828ffca3f5ecf31b853c66f7
+Subproject commit 171f4b42c7d6e179a987b98b46d8c9ae6f2fc36d