Update git submodules

* Update docs/submodules/releng/builder from branch 'master'
  to 47733870592d1deaa9aab54d0922ab4dd4d79d80
  - Merge "Prepare for git-commit-id plugin upgrade"
  - Prepare for git-commit-id plugin upgrade

    We have an upgrade to 2.2.4 upcoming, which will eliminate gitid.skip
    property. Add its replacement, so we are ready for that change.

    Change-Id: I85a16b588a5a7b8312059170171353f3f8eb7e5c
    Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

diff --git a/docs/submodules/releng/builder b/docs/submodules/releng/builder
index f2bb753ca34b150523d364b84618075edc6dd6f4..47733870592d1deaa9aab54d0922ab4dd4d79d80 160000 (submodule)
--- a/docs/submodules/releng/builder
+++ b/docs/submodules/releng/builder
@@ -1 +1 @@
-Subproject commit f2bb753ca34b150523d364b84618075edc6dd6f4
+Subproject commit 47733870592d1deaa9aab54d0922ab4dd4d79d80