[gfortran,patch] New option to use BLAS routines for matrix multiplication

[FX Coudert]

> Your patch changes libgfortran/configure, and that part of the  
> patch did not apply cleanly. But I saw no connection between the  
> changes in configure and what the rest of the patch does, so I  
> assume this is some leftover from other work (and configure wasn't  
> mentioned in the ChangeLog either).

Right. Sorry.

> Otherwise, Ok to commit.

Commited to mainline (rev 117948). Thanks for the review!

FX