Add support for all versions of automake 1.x >= 1.6.1

Thanks to Ray Vine for the original patch
This resolves bug 2891

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

cvs.sh

@@ -56,7 +56,7 @@ esac
 AUTOMAKE_STRING=`$AUTOMAKE --version | head -n 1`
 required_automake_version="1.6.1 or newer"
 case $AUTOMAKE_STRING in
-  automake*1.6.* | automake*1.7* | automake*1.8* | automake*1.9* | automake*1.10* | automake*1.11* | automake*1.12* | automake*1.13* | automake*1.14* | automake*1.15* )
+  automake*1.6.* | automake*1.[7-9]* | automake*1.[1-9][0-9]* )
     echo "*** $AUTOMAKE_STRING found."
     UNSERMAKE=no
     ;;