Updating the compiler to use the new-world model

New compiler is integrated and passes first test (Fibonacci).

Change-Id: Ic5448ab89ebd22baa30fafc3d1300324687d1fc2
diff --git a/src/constants.h b/src/constants.h
index 2dd13b7..f71857e 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -3,6 +3,17 @@
 #ifndef ART_SRC_CONSTANTS_H_
 #define ART_SRC_CONSTANTS_H_
 
+namespace art {
+
+enum InstructionSet {
+  kNone,
+  kArm,
+  kThumb2,
+  kX86
+};
+
+}  // namespace art
+
 #if defined(__i386__)
 #include "constants_x86.h"
 #elif defined(__arm__)