Core Data datamodel (*.xcdatamodel) files are not assigned the correct file type

What steps will reproduce the problem?
1. Create a project manually using a Core Data data model (*.xcdatamodel)
2. Generate the same project using gyp.

What is the expected output? What do you see instead?
The data model should be editable in xcode and function correctly when the 
project is built.  Instead the data model is not editable and the program 
crashes when trying to initialize the data model for the first time.  If you 
look at the gyp-generated project file the lastKnownFileType for the 
.xcdatamodel file is "text" when it should be "wrapper.xcdatamodel"

What version of the product are you using? On what operating system?
Latest version on Mac

Original issue reported on code.google.com by kanef...@google.com on 30 Oct 2012 at 9:08

CChenX / gyp

Core Data datamodel (*.xcdatamodel) files are not assigned the correct file type #303