Remember that VLC_ADD_BUILTINS is ugly and that we don't want to use it for modules that we actually want to be build

In ActiveX project, three files have to be generated from
axvlc.idl (API description file). This commit update those files
based on the latest .idl modifications.
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Hide it before someone thinks (s)he can use it without locking libvlc.