Add out-of-line constant pool support to Arm.

src/a64/assembler-a64.cc

Index: src/a64/assembler-a64.cc
diff --git a/src/a64/assembler-a64.cc b/src/a64/assembler-a64.cc
index 2323214fc49dbc690acdefe5eecf6de5f16be0c4..08d0614843df1b9bbd3d012a7c37790d1b62b0bc 100644
--- a/src/a64/assembler-a64.cc
+++ b/src/a64/assembler-a64.cc
@@ -2794,6 +2794,19 @@ void Assembler::RecordConstPool(int size) {
 }
 
 
+MaybeObject* Assembler::AllocateConstantPool(Heap* heap) {
+  // No out-of-line constant pool support.
+  UNREACHABLE();
+  return NULL;
+}
+
+
+void Assembler::PopulateConstantPool(ConstantPoolArray* constant_pool) {
+  // No out-of-line constant pool support.
+  UNREACHABLE();
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64