Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: remove relative paths for tmp build dirs

    Change-Id: I3246aa7d7b26b2d79ba9bd23aba4f305eb47fd94
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index fedbb1d..ebf87a2 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit fedbb1d10cbb3f6074773833261a70a26238558c
+Subproject commit ebf87a2efda6528e6963f8f4cc26f6767cd8e7bd