And add IVectorView<T> and IIterator<T> parameterized interfaces to
windows.foundation.idl for illustration and future use. They won't
generate any additional code until they are fully specialized.

This is a WIDL-specific feature, but MIDL has some magic knowledge of
these Windows.Foundation.Collections interface templates, and we need a
way to instruct WIDL about them too.

Having these interfaces declared in the IDL, guarded with __WIDL__ ifdef
is easier and more flexible than re-creating the types by hand in WIDL
source.
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>