gfortran windows builds script

[FX]

 > The current trunk does require flex.
 > The build dies pretty quickly unless flex is available.
>


Was the flex dependency recently reintroduced? It used to be that if  
you update trunk with contrib/gcc_update (instead of svn up), it sets  
the modifcation time of generated files so that flex and the autotools  
are not required.

I'm forwarding this to the gcc list for others' insight.

FX