Create ast/ and parsing/ subdirectories and move appropriate files

src/ast/modules.h

Index: src/ast/modules.h
diff --git a/src/modules.h b/src/ast/modules.h
similarity index 97%
rename from src/modules.h
rename to src/ast/modules.h
index f1dbd2516ac780d2960f496d938790899355a8c1..e3c66dce94dae5a1773599c14366a30d84007f41 100644
--- a/src/modules.h
+++ b/src/ast/modules.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_MODULES_H_
-#define V8_MODULES_H_
+#ifndef V8_AST_MODULES_H_
+#define V8_AST_MODULES_H_
 
 #include "src/zone.h"
 
@@ -118,4 +118,4 @@ class ModuleDescriptor : public ZoneObject {
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_MODULES_H_
+#endif  // V8_AST_MODULES_H_