clisp now builds on alpha and ia64

I used the more conservative flags of -D SAFETY=3 -D NO_MULTIMAP_SHM -D NO_MULTIMAP_FILE -D NO_SINGLEMAP -D NO_TRIVIALMAP for the more exotic architectures and it seems to work for alpha and itanium. The hppa buildd failed in a most strange way and I'm waiting with impatience for the results of the m68k and sparc jury :-).