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/tracer/recorder.cpp

@@ -2,14 +2,12 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "recorder.h"
 #include <cstring>
-
 #include "common/assert.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
 
-#include "recorder.h"
-
 namespace CiTrace {
 
 Recorder::Recorder(const InitialState& initial_state) : initial_state(initial_state) {}