Update NAnt config for Windows 8
Changed the build scripts that WP7 Uni Tests are not executed on Windows 8 because the Emulator does not run anymore
Revert "Changed the build scripts that WP7 Uni Tests are not executed on Windows 8 because the Emulator does not run anymore"

This reverts commit 18c2f25447205d52d8e8ca7db5707644147c725b.
Changed the build scripts that WP7 Uni Tests are not executed on Windows 8 because the Emulator does not run anymore
Now with the correct file