[CHANGESET] 3.1.50 tarball lacks m4 file

[John W. Eaton]

On 19-Jul-2008, Rafael Laboissiere wrote:

| * Rafael Laboissiere <rafael at debian.org> [2008-07-19 14:09]:
| 
| > The acx_blas_f77_func.m4 is lacking from the tarball, what makes "autoconf ;
| > ./configure" fail.  Attached chageset fixes this.
| 
| Oops, forgot the ChangeLog entry.  Consider the changeset attached below,
| instead.

I applied it.

Thanks,

jwe