Update git submodules

* Update docs/submodules/vswitchperf from branch 'master'
  - Merge "trex_stat_packet_counts: Add packet counts to trex reporting"
  - trex_stat_packet_counts: Add packet counts to trex reporting

    Adds packet count totals for transmit and receive to reporting
    at the end of test execution.

    JIRA: VSPERF-546

    Change-Id: I51027fae109d0ea794c0db03f5781ddb2fcbb941
    Signed-off-by: Christian Trautman <ctrautma@redhat.com>

diff --git a/docs/submodules/vswitchperf b/docs/submodules/vswitchperf
index 6583def..e1a3083 160000 (submodule)
--- a/docs/submodules/vswitchperf
+++ b/docs/submodules/vswitchperf
@@ -1 +1 @@
-Subproject commit 6583defcc0c5610f296c33446d5521d9030fc2b8
+Subproject commit e1a3083e346bb53fa533e5c7ad3b7c14c3c6f0b9