Update git submodules

* Update docs/submodules/releng from branch 'master'
  to bd49b8ed86f2afe25dd229fbc96e3f1b7fd938fd
  - Merge "Switch XtestingCI gate to another runner"
  - Switch XtestingCI gate to another runner

    Else it conflicts with docker builds.

    Change-Id: I4eeaa224e62e521008839487c283293231040787
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 36899bb..bd49b8e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 36899bbcbcf85a2c19d206c75ea234fb53c35646
+Subproject commit bd49b8ed86f2afe25dd229fbc96e3f1b7fd938fd