Log Message:
Fix dlopen(3) calls in _ctypes.so for X11BASE libraries

A Python code can dynamically load shared libraries and it's wrapped with
a plain dlopen(3) call. The holder of this interface (_ctypes module)
without rpath set to X11BASE cannot detect libs like 'GL'.

This might be the last step to fix issues with running GUI Python
applications on NetBSD.

Bump PKGREVISION.