Add MachRegister type query tests

[hainest]

@bbiiggppiigg No register for all three amdgpu architectures seem to be flags (according to isFlag).

[bbiiggppiigg]

@bbiiggppiigg No register for all three amdgpu architectures seem to be flags (according to isFlag).

I know some of the registers should be flag but are defined as HWR for now.
I should probably clean up the register definitions a bit. (And maybe how getBaseRegister is done for AMDGPU)
If this is not blocking any changes you're doing, I think I should wait until you are done with all your MachRegister changes.

[hainest]

@bbiiggppiigg No register for all three amdgpu architectures seem to be flags (according to isFlag).

I know some of the registers should be flag but are defined as HWR for now. I should probably clean up the register definitions a bit. (And maybe how getBaseRegister is done for AMDGPU) If this is not blocking any changes you're doing, I think I should wait until you are done with all your MachRegister changes.

Nope, it's not blocking me. I just wanted to make sure I had covered all the cases.

[hainest]

Moved to dyninst/dyninst#1855.