Update git submodules

* Update docs/submodules/bottlenecks from branch 'master'
  - bug-fix: no percentage calculated in verify ci

    JIRA: BOTTLNECK-219

    It seems that ci verify job could not get the coverage percentage
    for empty directory. This patch is to add __init__ file for the
    empty directory to avoid the empty check.
    note that offline test does not has this issue

    Change-Id: I67ce149438516429f7285e9424a57439b188c070
    Signed-off-by: Yang Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 56b1baf..37dd3b2 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 56b1baf063b06ad96bcb9267a5439646f77d2776
+Subproject commit 37dd3b2c579337c6cb8b1b3e46fca969ef924acf