Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Add fuel@x86 and fuel@arm support"
  - Add fuel@x86 and fuel@arm support

    Since scenario data do not have a field named architecture,
    So I choose pod_name for now.
    For example:
        pod_name: arm-pod5
    I assume that it is based arm architecture

    Change-Id: I92159a5e08b1ed80701494483fd9922dbd459193
    Signed-off-by: chenjiankun <chenjiankun1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 629d701..3d7d641 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 629d7018a9ee709d79afedcf0074a0a6a3c61d51
+Subproject commit 3d7d641703203eea25150519976fee93708b3741