Support NEVER alpha/color tests

They have occurred:
http://report.ppsspp.org/logs/kind/349

Even in games that do not appear to have any displaylist corruption (although mostly in games that seem to have that.)

We force "enableAlphaTest" and "enableColorTest" to false when it's ALWAYS, so '#' means NEVER.  I say we just statically discard in the shader and ignore it.  Might fix some effect (like the ratchet and clank thing, who knows), or more likely do nothing.

-[Unknown]