Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Use dnsmasq to cache DNS queries

    It's mandatory for clearwater_ims as musl's resolver queries
    nameservers all in parallel and accepts whichever response arrives
    first [1].

    [1] http://wiki.musl-libc.org/wiki/Functional_differences_from_glibc#Name_Resolver_.2F_DNS

    Change-Id: I01a17436279a0be2fac1b27b73052edc594c33e0
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 4fc36bd..f44ec39 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 4fc36bd22dc753627d3768affdc8dfa87f711952
+Subproject commit f44ec39992cd794deed624c48b1f5dc22ac91213