Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Allow specifying scenario and installer in commit message"
  - xci: Allow specifying scenario and installer in commit message

    It is not always practical to try determining scenario and installer
    to run jobs programmatically. This change adds possibility to do that
    by parsing commit message and skipping the automatic scenario and
    installer extraction.

    Change-Id: I10c9620fe8bb69a2d69fceb31d08084265aa1d75
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index cab3941..e863ea8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit cab3941aa6d98312f0a26a31582999e21e39528a
+Subproject commit e863ea8ca7fd75e49bd922aa18dca32d09d2ba74