Rename fletch -> dartino

src/vm/assembler_x64_macos.cc

Index: src/vm/assembler_x64_macos.cc
diff --git a/src/vm/assembler_x64_macos.cc b/src/vm/assembler_x64_macos.cc
index 56580215e7ebbc779faaa9c669d49962e66d1acf..337c8b28b93f119e2eb50c783da9fbe1cf4b92f0 100644
--- a/src/vm/assembler_x64_macos.cc
+++ b/src/vm/assembler_x64_macos.cc
@@ -2,12 +2,12 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
-#if defined(FLETCH_TARGET_X64) && defined(FLETCH_TARGET_OS_MACOS)
+#if defined(DARTINO_TARGET_X64) && defined(DARTINO_TARGET_OS_MACOS)
 
 #include <stdio.h>
 #include "src/vm/assembler.h"
 
-namespace fletch {
+namespace dartino {
 
 const char* kLocalLabelPrefix = "L";
 
@@ -64,6 +64,6 @@ void Assembler::LoadLabel(Register reg, const char* name) {
   Print("leaq _%s(%%rip), %rq", name, reg);
 }
 
-}  // namespace fletch
+}  // namespace dartino
 
-#endif  // defined(FLETCH_TARGET_X64) && defined(FLETCH_TARGET_OS_MACOS)
+#endif  // defined(DARTINO_TARGET_X64) && defined(DARTINO_TARGET_OS_MACOS)