Fix MSI Creation error

Receiving an error from candle when running the build script. Issue only occurs if there is a space in the project path.

error CNDL0117 : Your file or directory path 'C:\Users\Basement\Documents\Visual Studio 2013\Projects\hadouken\build\wixobj" C:\Users\Basement\Documents\Visual' cannot contain a quote. Quotes are often accidentally introduced when trying to refer to a directory path with spaces in it, such as "C:\Out Directory\". The correct representation for that path is: "C:\Out Directory\\".

I was able to fix the error by adding the extra backslash. I tested the new script in a project folder with spaces and without and it worked.