[issue] Broken mktime test in autoconf 2.61

[Stephen J. Turnbull]

This is possibly an issue for us since Mike likes 2.61...

Miles Bader writes:

 > Chong Yidong <cyd at stupidchicken.com> writes:
 > > Emacs pretest 23.0.91 is now available for download via FTP, at the
 > > following location:
 > >
 > >   http://alpha.gnu.org/gnu/emacs/pretest/emacs-23.0.91.tar.gz
 > 
 > BTW, the configure file in the pretest seems to have the broken mktime
 > test.  I've commited "configure" regenerated with a non-broken version
 > of autoconf, but you probably want to check that before making the
 > actual release...
 > 
 > [Seems to be broken in autoconf 2.61, and fixed in 2.63; don't know
 > about 2.62]