Update git submodules

* Update docs/submodules/releng from branch 'master'
  to c8bcbab71b721fb658567de7ed64a0bef2e84321
  - Call fbot instead of jenkins-ci

    Change-Id: I479d3618f2c65ba4114c04992e78ee25fcc01159
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2fe28e3..c8bcbab 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2fe28e379d85a6388685d8588e84bb90d7b5f50c
+Subproject commit c8bcbab71b721fb658567de7ed64a0bef2e84321