Update of /cvsroot/plplot/plplot/examples/f77
In directory sc8-pr-cvs1:/tmp/cvs-serv19082/examples/f77
Changed all the instances of "-L<dir> -l<lib>" to "<dir>/<lib>.la" for all
the libraries that are built in the source tree. This avoids some (rather
rare) cases of failure, when the libtool script will wrongly select
installed system libraries.