Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Set Jenkins parameter 'GIT_BASE' for overriding the default value"
  - Set Jenkins parameter 'GIT_BASE' for overriding the default value

    Set Yardstick Jenkins job's parameter 'GIT_BASE' for overriding the default
    GIT URL from Global Jenkins configuration.

    Change-Id: I6fe4a67589aa391c5bc7ac4433509dcfcce858c6
    Signed-off-by: trevortao <trevor.tao@arm.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a3c5676..f399b0e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a3c56768c819b1a8de6b69b19295038dd7a29bc3
+Subproject commit f399b0e3193cbe4271057091b5d6b52fc5f86d43