Make the debug messages more descriptive

Change-Id: I43f1675a1c6059cc86eaf84ac768242cfc80b88f
Reviewed-on: https://swiftshader-review.googlesource.com/3652
Tested-by: Greg Hartman <ghartman@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>
3 files changed