base-files: New files to fix permission issues (was Re: 1.7.10/1.7.11: .Net programs started from a cygwin console may fail.)

[Nellis, Kenneth]

From: Corinna Vinschen

> Thanks for the review.  Like this?

If you're open to improvements, the form
	x=$(($x + 1))
could arguably be improved with any of the following:
	x=$((x + 1))
	let x=x+1
	((x=x+1))
	((x++))
	((++x))

--Ken Nellis