Move core/scripts to build/scripts so that platform can use them.

Source/build/scripts/templates/StyleBuilder.cpp.tmpl

 {% from "macros.tmpl" import wrap_with_condition, license -%}
 {{ license() }}
 
 #include "config.h"
 #include "core/css/resolver/StyleBuilder.h"
 
 #include "StyleBuilderFunctions.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
 #include "core/css/resolver/StyleResolverState.h"
 
@@ skipping 65 matching lines @@
             StyleBuilderFunctions::applyValue{{ used_property_id }}(state, value);
         return true;
 {%- endcall %}
 {% endfor %}
     default:
         return false;
     }
 }
 
 } // namespace WebCore