i965: Provide more detailed information to match shader_time to programs.

i965: Provide more detailed information to match shader_time to programs.

Ken asked me the other day what -1 vs 0 vs 3 vs other meant in our shader
names, and I realized that it was really unclear.  I'd like to do even
better, like noting which one is the clear shader, but that would require
exposing the metaops struct to the driver.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>