test: do not link against a specific library
test: do not link against a specific library

E.g., you may have specified --disable-static on the command line, and
therefore libfnr.a won't exist.

Instead, use the ".la" Libtool-generated meta data file.  Then Libtool
will link against whatever library is relevant (.a or .so or ...etc.).

cisco/libfnr,cisco/libfnr,cisco/libfnr