fixed a problem in the generator where the way functions are remapped as

fixed a problem in the generator where the way functions are remapped as

* python/generator.py: fixed a problem in the generator where
  the way functions are remapped as methods on classes was
  not symetric and dependant on python internal hash order,
  as reported by Stéphane Bidoul
* libexslt/strings.c: attempt at fixing an object type pbm
* libxslt/triodef.h: update for OpenVMS from libxml2
Daniel