setup.exe cygdrive patch

[DJ Delorie]

> Sun Nov  5 12:51:42 2000 Jason Tishler <jt@dothill.com>
> 
>     * install.cc (do_install): Add call to set_cygdrive_flags to sync
>     the mount modes.
>     * mount.cc (set_cygdrive_flags): New function.
>     * mount.cc (get_cygdrive_flags): Ditto.
>     * mount.cc (default_cygdrive): Ditto.
>     * mount.cc (set_cygdrive_flags): Ditto.
>     * mount.h: Add prototype for set_cygdrive_flags.

Applied, installed, and on the web.  Thanks!