minor problem with the file gcc/f/runtime/libU77/config.cache

[Jeffrey A Law]

  In message < 9710061244.AA09224@drfmc.ceng.cea.fr >you write:
  > 	The above file isn't updated after I made a cleaning using 
  > a "make clean" or "a make distclean", followed by a configuration 
  > using "./configure [..]".
  > 
  > 	This led to a bootstrap failure as the information cached 
  > is referring to stage2/xgcc which doesn't exist yet since the failure 
  > happens after the first building of the compiler..
I believe this has been fixed for the next snapshot.

jeff