bug#68274: automake 1.16j nonnumerical version confuses scripts

[Carl Hansen]

Building a package (happens to be "jami") , which runs a script it its 
build process that checks for automake

      expr: non-integer argument    
      automake (GNU automake) 1.16j    
    
      Fatal error: automake 1.7 or higher is required.  Please set $AUTOMAKE    
      to point to a newer automake, or upgrade.    

Problem is the script expects numerical version, thus gets confused.

Next version, make it something like  "automake 1.16.99999" or something.