Create ast/ and parsing/ subdirectories and move appropriate files

tools/parser-shell.cc

Index: tools/parser-shell.cc
diff --git a/tools/parser-shell.cc b/tools/parser-shell.cc
index da874595de4bb1c4cfa8be18bb5b7b747b3a015a..5d4b0cc490d2c7e2e36761e3ab3769ebca9f8cab 100644
--- a/tools/parser-shell.cc
+++ b/tools/parser-shell.cc
@@ -36,12 +36,12 @@
 #include "include/libplatform/libplatform.h"
 #include "src/api.h"
 #include "src/compiler.h"
-#include "src/scanner-character-streams.h"
+#include "src/parsing/scanner-character-streams.h"
+#include "src/parsing/parser.h"
+#include "src/parsing/preparse-data-format.h"
+#include "src/parsing/preparse-data.h"
+#include "src/parsing/preparser.h"
 #include "tools/shell-utils.h"
-#include "src/parser.h"
-#include "src/preparse-data-format.h"
-#include "src/preparse-data.h"
-#include "src/preparser.h"
 
 using namespace v8::internal;