Update git submodules

* Update docs/submodules/releng from branch 'master'
  to e3d698634d0d751ebd4d9701c134af03bb5852b7
  - Revert "use lf-virtual1 instead of lf-build2 which is failing"

    This reverts commit 2c2babc8b92352fe13b54ba473a920da60f0d9f1.

    Change-Id: I98ea2bf682c09d2ed2de7ab11c166044ef71428b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2c2babc..e3d6986 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2c2babc8b92352fe13b54ba473a920da60f0d9f1
+Subproject commit e3d698634d0d751ebd4d9701c134af03bb5852b7