OpenCL: Show ptxas info from verbosity 4 (was 5)

[magnumripper]

Level 5 would also show autotune stats, which is not always what I want. Also, we now get compiler warnings and ptxas at the same verbosity level which is logical (to me, at least).

[solardiz]

I don't mind, although maybe I'd want to see auto-tuning before I see build logs (so levels 4 and 5 swapped in this respect?)

Also, the names of these VERB_* constants are weird. But not to fix here.

[magnumripper]

Yes they are weird for hysterical reasons.

I'd love to change verbosity to a bitfield and have verbosity only as "low or high" but settable for specific contexts. So in your case something like -verbosity=+autotune,-nv-verbose (overriding any conf settings - they would be supported for each bit/context). It could even have some kind of backward compatibility so -verbosity=5 would set and unset default bits to a result similar to today. But I'm not sure I'll ever have time to implement any of this (and with "love to implement" I really mean "love to have implemented by someone else" lol.

Another thing I've pondered is to add something like -conf-override=xx so we don't need specific options for overriding config values - would make it a one-for-all canonical code. Like ssh -o option.