Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Update the postscriptbuild usage"
  - Update the postscriptbuild usage

    when we want to trigger the scipt only when previous builders fail, we
    should also set the other macro 'script-only-if-succeeded' to false, the
    default value is true.

    script-only-if-succeeded: false
    script-only-if-failed: true

    Change-Id: Ifdca24ea8d076dd4e16ef466705e0167b97cf1df
    Signed-off-by: Julien <zhang.jun3g@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1e1068c..71096f1 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1e1068cad85adccecedda66eee7715530173e32a
+Subproject commit 71096f12b5abf87dfb257902ec78b3130727bd33