Add clang-format to repo

Add clang-format to repo.

Change-Id: I5cc1e4ed3fcbf41a28e16cf929a86cf54a3c5efb
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/src/main.cpp b/src/main.cpp
index bd4ec2a..6107949 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -14,9 +14,9 @@
 // limitations under the License.
 */
 
-#include "reset_button.hpp"
-#include "power_button.hpp"
 #include "id_button.hpp"
+#include "power_button.hpp"
+#include "reset_button.hpp"
 
 int main(int argc, char* argv[])
 {