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/y2019/jevois/uart.cc b/y2019/jevois/uart.cc
index 9cded62..0fc25c9 100644
--- a/y2019/jevois/uart.cc
+++ b/y2019/jevois/uart.cc
@@ -3,6 +3,7 @@
 #include <array>
 
 #include "absl/types/span.h"
+
 #include "aos/util/bitpacking.h"
 #include "y2019/jevois/jevois_crc.h"
 #ifdef __linux__