IDL: Add build target for IDL dictionary impl generation in core

Source/bindings/core/idl.gypi

Index: Source/bindings/core/idl.gypi
diff --git a/Source/bindings/core/idl.gypi b/Source/bindings/core/idl.gypi
index b4d1842b90dc5a680597edf20274ef426f1dc42b..0d125521413e524df26766727ccb7885ef4bfa0e 100644
--- a/Source/bindings/core/idl.gypi
+++ b/Source/bindings/core/idl.gypi
@@ -11,17 +11,22 @@
   ],
 
   'variables': {
+    'core_idl_definition_files': [
+      '<@(core_idl_files)',
+      '<@(core_dictionary_idl_files)',
+    ],
+
     # IDL file lists; see: http://www.chromium.org/developers/web-idl-interfaces
     # Interface IDL files: generate individual bindings (includes testing)
     'core_interface_idl_files': [
-      '<@(core_idl_files)',
+      '<@(core_idl_definition_files)',
       '<@(webcore_testing_idl_files)',
       '<@(generated_webcore_testing_idl_files)',
     ],
 
     # Write lists of main IDL files to a file, so that the command lines don't
     # exceed OS length limits.
-    'core_idl_files_list': '<|(core_idl_files_list.tmp <@(core_idl_files))',
+    'core_idl_files_list': '<|(core_idl_files_list.tmp <@(core_idl_definition_files))',
 
     # Dependency IDL files: don't generate individual bindings, but do process
     # in IDL dependency computation, and count as build dependencies
@@ -52,7 +57,7 @@
 
     # Static IDL files
     'core_static_interface_idl_files': [
-      '<@(core_idl_files)',
+      '<@(core_idl_definition_files)',
       '<@(webcore_testing_idl_files)',
     ],
     'core_static_dependency_idl_files': [