Run clang-format on the entire repo

This patch clang-formats the entire repo. Third-party code is
excluded.

I needed to fix up the .clang-format file so that all the header
includes are ordered properly. I could have sworn that it used to work
without the extra modification, but I guess not.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: I64bb9f2c795401393f9dfe2fefc4f04cb36b52f6
diff --git a/aos/testing/gtest_main.cc b/aos/testing/gtest_main.cc
index a6e944c..21f141f 100644
--- a/aos/testing/gtest_main.cc
+++ b/aos/testing/gtest_main.cc
@@ -2,11 +2,12 @@
 
 #include <iostream>
 
-#include "aos/init.h"
 #include "gflags/gflags.h"
 #include "glog/logging.h"
 #include "gtest/gtest.h"
 
+#include "aos/init.h"
+
 DEFINE_bool(print_logs, false,
             "Print the log messages as they are being generated.");
 DEFINE_string(log_file, "",