Add Float64x2, Float64x2List, etc... with runtime and dart2js implementations

runtime/vm/intrinsifier.h

Index: runtime/vm/intrinsifier.h
diff --git a/runtime/vm/intrinsifier.h b/runtime/vm/intrinsifier.h
index d1605d934f3f6009626689725c3664a570a72521..82f4d11782182652d44cc8c8af0fbe21c1e60a97 100644
--- a/runtime/vm/intrinsifier.h
+++ b/runtime/vm/intrinsifier.h
@@ -117,6 +117,7 @@ namespace dart {
   V(_Float64Array, _new, TypedData_Float64Array_new, 311965335)                \
   V(_Float32x4Array, _new, TypedData_Float32x4Array_new, 775330800)            \
   V(_Int32x4Array, _new, TypedData_Int32x4Array_new, 2074077580)               \
+  V(_Float64x2Array, _new, TypedData_Float64x2Array_new, 1540328543)           \
   V(_Int8Array, ., TypedData_Int8Array_factory, 545976988)                     \
   V(_Uint8Array, ., TypedData_Uint8Array_factory, 981297074)                   \
   V(_Uint8ClampedArray, ., TypedData_Uint8ClampedArray_factory, 1617830104)    \
@@ -130,6 +131,7 @@ namespace dart {
   V(_Float64Array, ., TypedData_Float64Array_factory, 1599078532)              \
   V(_Float32x4Array, ., TypedData_Float32x4Array_factory, 879975401)           \
   V(_Int32x4Array, ., TypedData_Int32x4Array_factory, 924582681)               \
+  V(_Float64x2Array, ., TypedData_Float64x2Array_factory, 1654170890)          \
 
 
 // TODO(srdjan): Implement _FixedSizeArrayIterator, get:current and