Format header files

In my PR updating clang-format, I forgot to also format the headers.

src/systemtask/Messages.h

@@ -1,5 +1,6 @@
 #pragma once
 #include <cstdint>
+
 namespace Pinetime {
   namespace System {
     enum class Messages : uint8_t {

src/systemtask/SystemTask.h

@@ -36,6 +36,7 @@
 #include "systemtask/Messages.h"
 
 extern std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> NoInit_BackUpTime;
+
 namespace Pinetime {
   namespace Drivers {
     class Cst816S;
@@ -45,11 +46,13 @@ namespace Pinetime {
     class TwiMaster;
     class Hrs3300;
   }
+
   namespace Controllers {
     class Battery;
     class TouchHandler;
     class ButtonHandler;
   }
+
   namespace System {
     class SystemTask {
     public: