qtgui: fixed issue with newer versions of QT.

When creating the qApplication in the block, we have to make sure argc>0, argv contains at least one valid character (\0), and they exist over the life of the application.
digital: cleaned up pfb_clock_sync blocks and make sure fff and ccf doing the same things.

Updated QA code to tighten up specs because of better convergence now.
Merge branch 'master' into next