Remove cinstall src directory from snapshots

[Christopher Faylor]

How should the sources for utils and cinstall be distributed?

I have just managed to separate winsup/utils as a separate binary
release but I'm not 100% certain how to release the sources.

winsup/utils is pretty useless without the cygwin directories, I think.
It can probably get by with the installed mingw/w32api, though.

So, I'm not sure how to release utils.  Maybe I need to separate out
the parts of cygwin that get used by utils and put it in a separate
directory.

Wrt to cinstall, I'd like to stop including the sources in snapshots and
net releases.  I believe that means that we'll have to release the sources
via some other method to be GPL compliant.

I know that Robert has a plan for this but maybe this is as simple as
just including a tar ball next to setup.exe at sources.redhat.com.

cgf