Do not run gdbddash test on darwin.
Use lldb on darwin.

This doesn't work, because darwin apparently does weird things with console input.
Add declint-lldb.good
Split prediff files and add lldb-specific filters.
Updated declint-lldb.prediff and .good following testing.
Merge pull request #690 from hildeth/quietGDBdarwin

Quiet gdbddash test on darwin

I added a .skipif file, so the existing test does not run on darwin.
I added the new test declint-lldb that is run only on darwin and tosses the --lldb flag instead.