eh_personality.cc: Include unwind-pe.h.

eh_personality.cc: Include unwind-pe.h.

        * libsupc++/eh_personality.cc: Include unwind-pe.h.  Remove
        all pointer encoding logic.
        (struct lsda_header_info): Add ttype_base.
        (get_ttype_entry): Use it instead of a context.
        (check_exception_spec): Likewise.
        (PERSONALITY_FUNCTION): Initialize ttype_base.  Store it in
        the c++ exception header for __cxa_call_unexpected.
        (__cxa_call_unexpected): Use it.

From-SVN: r41982