selftest: Update PATH for nettest in fcnal-test

Allow fcnal-test.sh to be run from top level directory in the
kernel repo as well as from tools/testing/selftests/net by
setting the PATH to find the in-tree nettest.
Signed-off-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240124214117.24687-2-dsahern@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/net/fcnal-test.sh

@@ -38,6 +38,9 @@
 # server / client nomenclature relative to ns-A
 
 source lib.sh
+
+PATH=$PWD:$PWD/tools/testing/selftests/net:$PATH
+
 VERBOSE=0
 
 NSA_DEV=eth1