formatter: update clang-format and fix-up file(s)

clang-format-6.0 introduced new changes, also then updates to
.clang-format introduce more new changes.

Change-Id: Iec9f84e3a7a5bf254d66eee46cdc9b3070e06687
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/app.cpp b/app.cpp
index 874df67..1ec886c 100644
--- a/app.cpp
+++ b/app.cpp
@@ -14,11 +14,13 @@
  * limitations under the License.
  */
 #include "config.h"
+
 #include "manager.hpp"
-#include <sdbusplus/bus.hpp>
+
 #include <cstdlib>
-#include <iostream>
 #include <exception>
+#include <iostream>
+#include <sdbusplus/bus.hpp>
 
 int main(int argc, char* argv[])
 {