clang-format: update to latest from docs repo

Since `Cpp11` is an alias for `Latest` and we should tend towards using the
latest C++ standard, update the C++ standard to Latest.

https://github.com/llvm/llvm-project/commit/e5032567903de19962333c4bf7d2edceaf4f9824#diff-b49a097415dff2837d9626d422c58ba8R82
https://github.com/openbmc/docs/blob/master/style/cpp/.clang-format

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I6bd62f057c6881b4e931c1968d71ce5478832d73
diff --git a/epoch_base.cpp b/epoch_base.cpp
index 507c5ff..96552ac 100644
--- a/epoch_base.cpp
+++ b/epoch_base.cpp
@@ -1,12 +1,13 @@
 #include "epoch_base.hpp"
 
-#include <iomanip>
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/elog.hpp>
 #include <phosphor-logging/log.hpp>
-#include <sstream>
 #include <xyz/openbmc_project/Time/error.hpp>
 
+#include <iomanip>
+#include <sstream>
+
 namespace // anonymous
 {
 constexpr auto SYSTEMD_TIME_SERVICE = "org.freedesktop.timedate1";
@@ -25,8 +26,7 @@
 
 EpochBase::EpochBase(sdbusplus::bus::bus& bus, const char* objPath) :
     sdbusplus::server::object::object<EpochTime>(bus, objPath), bus(bus)
-{
-}
+{}
 
 void EpochBase::onModeChanged(Mode mode)
 {