Update git submodules

* Update docs/submodules/releng from branch 'master'
  - functest: Enable euphrates jobs

    Change-Id: I536d3182ef7f4b598f734502cc0880201487d968
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d0449db..26a79bc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d0449dba1281968d9ba9343d812057bd7e5758dc
+Subproject commit 26a79bc759438bb3f25747776cced79957d8a8ff