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/stl_mutex/stl_mutex_test.cc b/aos/stl_mutex/stl_mutex_test.cc
index 5abd934..5e88c56 100644
--- a/aos/stl_mutex/stl_mutex_test.cc
+++ b/aos/stl_mutex/stl_mutex_test.cc
@@ -1,8 +1,9 @@
 #include "aos/stl_mutex/stl_mutex.h"
 
-#include "aos/die.h"
 #include "gtest/gtest.h"
 
+#include "aos/die.h"
+
 namespace aos {
 namespace testing {