All the special environment variables from the command shell which
track directory use are stripped out from the C runtime
environ/wenviron.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=45320Signed-off-by: Jason Edmeades <us@edmeades.me.uk>
Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>