revert 787843b

Restore the Clean action as "together".

Jam splits the args according to MAXLINE, which was too large.
M68K: Switch to new gcc options for specifying cpu

Latest gcc converts the old ones to the new ones anyway...
including when passing to gas, which of course is not new enough,
so we have to also force gcc to pass the old one around in one case.
M68K: drop dupplicate strlen

Seems we have our own now.
M68K: Account for extra parameter to create_area_etc()

Would have been nice to also fix 68k code... just sayin.