Update git submodules

* Update docs/submodules/vswitchperf from branch 'master'
  - report: Update paths after doc reorganization

    Directory with report files was moved to different
    location. Thus CI build script must be updated too.

    Change-Id: Id5b4c8b2740c01c821c25f8bfdaeb25352410e76
    Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
    Reviewed-by: Al Morton <acmorton@att.com>
    Reviewed-by: Christian Trautman <ctrautma@redhat.com>
    Reviewed-by: Sridhar Rao <sridhar.rao@spirent.com>
    Reviewed-by: Trevor Cooper <trevor.cooper@intel.com>

diff --git a/docs/submodules/vswitchperf b/docs/submodules/vswitchperf
index 1f889a9..3e22a01 160000 (submodule)
--- a/docs/submodules/vswitchperf
+++ b/docs/submodules/vswitchperf
@@ -1 +1 @@
-Subproject commit 1f889a9e222ffedbc8da497b7dd2f48335f1db78
+Subproject commit 3e22a019e196996230b47d91b9c3c4893656a3c6