[Arm]: Enable use of extended out-of-line constant pool for Arm.

src/arm/constants-arm.h

Index: src/arm/constants-arm.h
diff --git a/src/arm/constants-arm.h b/src/arm/constants-arm.h
index 6a2d82fed42e055ef092fcad58ba781359e9a86a..3316bb50454ff76ba4783f036b093425a26961ef 100644
--- a/src/arm/constants-arm.h
+++ b/src/arm/constants-arm.h
@@ -568,6 +568,7 @@ class Instruction {
   inline int Immed4Value() const { return Bits(19, 16); }
   inline int ImmedMovwMovtValue() const {
       return Immed4Value() << 12 | Offset12Value(); }
+  DECLARE_STATIC_ACCESSOR(ImmedMovwMovtValue);
 
   // Fields used in Load/Store instructions
   inline int PUValue() const { return Bits(24, 23); }