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.hpp b/epoch_base.hpp
index 40025c4..89a7b85 100644
--- a/epoch_base.hpp
+++ b/epoch_base.hpp
@@ -4,10 +4,11 @@
 
 #include "property_change_listener.hpp"
 
-#include <chrono>
 #include <sdbusplus/bus.hpp>
 #include <xyz/openbmc_project/Time/EpochTime/server.hpp>
 
+#include <chrono>
+
 namespace phosphor
 {
 namespace time
@@ -18,9 +19,10 @@
  *  @details A base class that implements xyz.openbmc_project.Time.EpochTime
  *  DBus API for epoch time.
  */
-class EpochBase : public sdbusplus::server::object::object<
-                      sdbusplus::xyz::openbmc_project::Time::server::EpochTime>,
-                  public PropertyChangeListner
+class EpochBase :
+    public sdbusplus::server::object::object<
+        sdbusplus::xyz::openbmc_project::Time::server::EpochTime>,
+    public PropertyChangeListner
 {
   public:
     friend class TestEpochBase;