cygport expects package autoconf version integers but can have suffixes

Hi folks,

It appears that upstream package autoconf versions can now have git-like 
suffixes so are no longer always only integer patch levels:

$ gettext-0.26-1.noarch/src/gettext-0.26/configure --version
gettext configure package
generated by GNU Autoconf 2.72.85-f3b0a

/usr/share/cygport/cygclass/autotools.cygclass: line 724: [: 85-f3b0a: integer 
expression expected
/usr/share/cygport/cygclass/autotools.cygclass: line 738: [: 85-f3b0a: integer 
expression expected

some mitigation appears required as under mingw package build, stdout is closed, 
and the rest of the compile log and subsequent logs do not appear: see GH 
Scallywag job 10992 rerunning as 10994!

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry