stmt_rel.exp: relax requirement for PASS

stmt_rel.exp: relax requirement for PASS

We previously required that all linenos accessible through wildcards
were the same set as all linenos individually accessible through
relative numbering.

The issue is that two linenos may correspond to the same address (e.g.
due to optimization), in which case a wildcard probe would only pick up
the first lineno (since the second lineno would be eliminated due to
being the same address), which two individual relative probes for these
two linenos would both resolve.

So instead, this test now simply checks that all the linenos which were
found in the wildcard probe were also accessible through relative lineno
(i.e. a subtest test instead of equality test).