Kill constants.h and fix some copyright headers.

Change-Id: I51c04d731d6de035328781d8ac134ad6fcf49897
diff --git a/src/disassembler.h b/src/disassembler.h
index de9c8d1..bd745a8 100644
--- a/src/disassembler.h
+++ b/src/disassembler.h
@@ -17,7 +17,11 @@
 #ifndef ART_SRC_DISASSEMBLER_H_
 #define ART_SRC_DISASSEMBLER_H_
 
-#include "constants.h"
+#include <stdint.h>
+
+#include <iosfwd>
+
+#include "instruction_set.h"
 
 namespace art {