Remove empty newlines in #include blocks.

This makes clang-format useful on those.

Also add a bunch of forgotten transitive includes, which otherwise
prevented compilation.

src/core/core_timing.cpp

@@ -2,17 +2,15 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "core/core.h"
 #include <atomic>
 #include <cinttypes>
 #include <mutex>
 #include <vector>
-
 #include "common/chunk_file.h"
 #include "common/logging/log.h"
 #include "common/string_util.h"
-
 #include "core/arm/arm_interface.h"
-#include "core/core.h"
 #include "core/core_timing.h"
 
 int g_clock_rate_arm11 = 268123480;