i965: Use the object label when available for INTEL_DEBUG=vs,gs,fs output.

Note that this requires updated run.py in shader_db.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
4 files changed