Pre-cache PLY yacc parse table and use optimized mode (45% build time improvement)

Tools/Scripts/webkitpy/bindings/main.py

Index: Tools/Scripts/webkitpy/bindings/main.py
diff --git a/Tools/Scripts/webkitpy/bindings/main.py b/Tools/Scripts/webkitpy/bindings/main.py
index 72403ef3a11f669104f16e9af1f2791ba131811b..cb9fcd977aec4c01bc26bcac408e2286d9a96c46 100644
--- a/Tools/Scripts/webkitpy/bindings/main.py
+++ b/Tools/Scripts/webkitpy/bindings/main.py
@@ -215,8 +215,9 @@ class BindingsTests(object):
                        os.path.join(self.output_directory, output_file))
                       for output_file in os.listdir(self.output_directory)
                       # Skip cache
-                      if (output_file != 'parsetab.py' and  # PLY cache
-                          not output_file.endswith('.cache'))]  # Jinja cache
+                      if not output_file.endswith(('.pickle',  # PLY yacc
+                                                   '.cache',  # Jinja
+                                                   ))]
         return all([self.identical_file(reference_filename, output_filename)
                     for (reference_filename, output_filename) in file_pairs])