Which causes cppuhelper to pick wrong variant from other library, now that its own
symbols are no longer reduced to private on Mac OS X.  As a temporary hack, emit
cppu_detail_getCppuType for the relevant types always as fully comprehensive; should
be revisited when improving types.rdb format (routinely generating C++ information
for certain UNO types into a dedicated library?).  Requires a fix to xmlreader and
a fix to forms that looks like a Mac OS X GCC bug.