Update git submodules

* Update docs/submodules/vswitchperf from branch 'master'
  - qemu_regex_fix: Regex change for future qemu versions info cpu

    When running info cpus command on qemu newer versions of 2.12
    the output has changed. This is causing the regex lookup for
    the thread match to affinitize the PID to the correct CPU.

    JIRA: VSPERF-592

    Change-Id: Ie3a4490f3f8da1e4df00c7095cf1f05fdd939e07
    Signed-off-by: Christian Trautman <ctrautma@redhat.com>

diff --git a/docs/submodules/vswitchperf b/docs/submodules/vswitchperf
index 80b86f4..bc569ef 160000 (submodule)
--- a/docs/submodules/vswitchperf
+++ b/docs/submodules/vswitchperf
@@ -1 +1 @@
-Subproject commit 80b86f4e073dc6c9ca53704adc6b22c665e9f953
+Subproject commit bc569ef41ec4120ee63bfa43c2b647cd96957ccb