Add fortran suffix back to configure.ac

Author: sethrj

configure.ac

@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 dnl The macros which aren't shipped with the autotools are stored in the
 dnl Tools/config directory in .m4 files.
 
-AC_INIT([swig],[4.1.0],[http://www.swig.org])
+AC_INIT([swig],[4.1.0+fortran],[http://www.swig.org])
 AC_PREREQ([2.60])
 
 AC_CONFIG_SRCDIR([Source/Swig/swig.h])