Rename fletch -> dartino

src/vm/assembler_x64.cc

Index: src/vm/assembler_x64.cc
diff --git a/src/vm/assembler_x64.cc b/src/vm/assembler_x64.cc
index f5b208e014c2d7c81fdaeaa57e3bbab2e5398e16..c04f9eb9efe4e54379bec833a017936e1c485b8c 100644
--- a/src/vm/assembler_x64.cc
+++ b/src/vm/assembler_x64.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)
+#if defined(DARTINO_TARGET_X64)
 
 #include <stdarg.h>  // NOLINT we don't include assembler_x64.h
 #include "src/vm/assembler.h"
 
-namespace fletch {
+namespace dartino {
 
 enum RegisterSize { kLongRegister = 'l', kQuadRegister = 'q' };
 
@@ -219,6 +219,6 @@ const char* Assembler::ConditionMnemonic(Condition condition) {
   return kConditionMnemonics[condition];
 }
 
-}  // namespace fletch
+}  // namespace dartino
 
-#endif  // defined FLETCH_TARGET_X64
+#endif  // defined DARTINO_TARGET_X64