Break xfa_basic_data up to smaller files

xfa.gyp

 {
   "variables": {
     "chromium_code": 1,
     "pdf_enable_v8%": 1,
   },
   "target_defaults": {
     "defines": [
       "PDF_ENABLE_XFA",
     ],
     'msvs_disabled_warnings': [
@@ skipping 492 matching lines @@
         "xfa/fxfa/parser/cxfa_tooltip.h",
         "xfa/fxfa/parser/cxfa_validate.cpp",
         "xfa/fxfa/parser/cxfa_validate.h",
         "xfa/fxfa/parser/cxfa_value.cpp",
         "xfa/fxfa/parser/cxfa_value.h",
         "xfa/fxfa/parser/cxfa_valuearray.cpp",
         "xfa/fxfa/parser/cxfa_valuearray.h",
         "xfa/fxfa/parser/cxfa_widgetdata.cpp",
         "xfa/fxfa/parser/cxfa_widgetdata.h",
         "xfa/fxfa/parser/xfa_basic_data.cpp",
+        "xfa/fxfa/parser/xfa_basic_data_attributes.cpp",
+        "xfa/fxfa/parser/xfa_basic_data_element_attributes.cpp",
+        "xfa/fxfa/parser/xfa_basic_data_element_properties.cpp",
+        "xfa/fxfa/parser/xfa_basic_data_element_script.cpp",
+        "xfa/fxfa/parser/xfa_basic_data_enum.cpp",
+        "xfa/fxfa/parser/xfa_basic_data_packets.cpp",
         "xfa/fxfa/parser/xfa_basic_data.h",
         "xfa/fxfa/parser/xfa_basic_imp.cpp",
         "xfa/fxfa/parser/xfa_basic_imp.h",
         "xfa/fxfa/parser/xfa_doclayout.h",
         "xfa/fxfa/parser/xfa_document.h",
         "xfa/fxfa/parser/xfa_document_datadescription_imp.cpp",
         "xfa/fxfa/parser/xfa_document_datadescription_imp.h",
         "xfa/fxfa/parser/xfa_document_datamerger_imp.cpp",
         "xfa/fxfa/parser/xfa_document_datamerger_imp.h",
         "xfa/fxfa/parser/xfa_document_imp.cpp",
@@ skipping 80 matching lines @@
           "sources": [],
         }],
         ["OS == 'mac'", {
           "configurations": {},
           "sources": [],
         }],
       ]
     }
   ]
 }