scripts/dso-ordering-test.py: Generate program run-time dependencies

The main program needs to depend on all shared objects, even objects
that have link-time dependencies among shared objects.  Filtering
out shared objects that already have an link-time dependencies is not
necessary here; make will do this automatically.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 183d9973)