Fix two more errors in full WatchDogs dump.

1) Add missing opcode for SAMPLE_B.  Similar to Sample_L, but this is for SampleBias instruction.  Verified that it generates the code correctly when recompiled.
2) Change MOVC handler to not do the while loop for each component piece.  Not sure why that was being done, but it generated errors when it would see movc r2, r2, ... because r2 would be modified in first instruction. Rolled them all back into a single instruction and verified output matches original.

Remove all the ShaderFixes for WatchDogs as they are now obsolete or code fixed, so we don't need the manual fix.