Kill constants.h and fix some copyright headers.

Change-Id: I51c04d731d6de035328781d8ac134ad6fcf49897
diff --git a/src/compiled_method.h b/src/compiled_method.h
index d2c28a7..b98df39 100644
--- a/src/compiled_method.h
+++ b/src/compiled_method.h
@@ -19,7 +19,7 @@
 
 #include <vector>
 
-#include "constants.h"
+#include "instruction_set.h"
 #include "utils.h"
 
 namespace llvm {