Fix kicad PKGBUILD.

I fixed the KiCad PKGBUILD and modified the file layout patch.  Both mingw32 and mingw64 packages build correctly.  I think I even got the GitHub pull request done right.  Let me know if there is anything else I need to do.  I still have to package the help files and the library files.  I may package them separately to keep the size of the pack file reasonably sane.

Best Regards,

Wayne