[libgfortran] Actually use GCC_NO_EXECUTABLES

[Kelley Cook]

In libfortran's configure, GCC_NO_EXECUTABLES wasn't being picked up 
(due to a recently fixed aclocal oversight).  Apparently nobody making a 
cross compiler with libgfortran noticed.

After regenerating with automake 1.9.3 and initally getting strange 
errors, I had to add some missed quoting in the LIBGFOR_GETTIMEOFDAY 
macro.  Then I added ACLOCAL_AMFLAGS so autoreconf will know where to 
look for no-executables.m4

As a side bonus the 1.8.5->1.9.3 automake upgrade knocks more than 1400 
repetitive lines out of the generated Makefile.in.

Both fall under the obvious rule.  Regenerated with automake 1.9.3. 
Committed after a powerpc-apple-darwin7.5.0 bootstrap.

Kelley Cook
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