VM: Re-format to use at most one newline between functions

runtime/vm/thread_interrupter.h

Index: runtime/vm/thread_interrupter.h
diff --git a/runtime/vm/thread_interrupter.h b/runtime/vm/thread_interrupter.h
index a2e54ad7e400f0ca44626d0d4c7f129b5dc65e7d..204f824374d4483587417c812725cfb627a2b3c9 100644
--- a/runtime/vm/thread_interrupter.h
+++ b/runtime/vm/thread_interrupter.h
@@ -6,8 +6,8 @@
 #define RUNTIME_VM_THREAD_INTERRUPTER_H_
 
 #include "vm/allocation.h"
-#include "vm/signal_handler.h"
 #include "vm/os_thread.h"
+#include "vm/signal_handler.h"
 #include "vm/thread.h"
 
 namespace dart {
@@ -20,7 +20,6 @@ struct InterruptedThreadState {
   uintptr_t lr;
 };
 
-
 class ThreadInterrupter : public AllStatic {
  public:
   static void InitOnce();