Fixed .bad mismatch for hplx.chpl.
Merge pull request #991 from vasslitvinov/fix--hplx.bad--mismatch

Fixed .bad mismatch for hplx.chpl.

This test has been failing in more and more diverse ways.
I keep relaxing PREDIFF to accept these failures, so I can have .bad
and match clean against it.

Or, Kyle suggests, maybe this test shouldn't have a .bad?