Add Mike's latest Alien shaders, fix for cb1.

This removes setting the cb1 in the VS, and just references the struct in the PS, so VS doesn't need to be modified.

Also changes some movc instructions that should work either way, although I don't think there is any need for them to change.
Add Alien crosshair shader.

From Helifax.  Changed to use .x param instead of .z to match the rest.