cl_dump/autogen improvements

* Added NV_SHADER to autogen and cl_dis so those shader records can be
disassembled.

* Added search functionality to cl_dump which can search a memory region
for bin lists
v3d_test and v3d_module work now

v3d_test can now reliably produce a buffer full of clear colour.
Everything's still a bit of a mess, needs tidying up.