Initialize fast memmove methods in the Isolate's ctor

src/utils.h

Index: src/utils.h
diff --git a/src/utils.h b/src/utils.h
index 1fe6a3213c776251dd96121f242ef363d49f0c60..d24eef7439b5a9450dfd7993b45650e0aaaf3328 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -366,9 +366,8 @@ inline uint32_t ComputePointerHash(void* ptr) {
 // ----------------------------------------------------------------------------
 // Generated memcpy/memmove
 
-// Initializes the codegen support that depends on CPU features. This is
-// called after CPU initialization.
-void init_memcopy_functions();
+// Initializes the codegen support that depends on CPU features.
+void init_memcopy_functions(Isolate* isolate);
 
 #if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X87)
 // Limit below which the extra overhead of the MemCopy function is likely