configure.ac: Run gen-ver.sh to get the version value
configure.ac: Run gen-ver.sh to get the version value

Use the gen-ver.sh returned value with AC_INIT. Set VERSION_MM to the
gen-ver.sh returned value. Remove unused AM_CONDITIONAL for HAVE_VN.

alech/libquvi-scripts,legatvs/libquvi-scripts,alech/libquvi-scripts,legatvs/libquvi-scripts