improve log when debugging.
improve log when debugging.

Some messages may happen more than once in the same function and
discovering the line is hard. Now we print the actual log priority
that exposed the message as well as filename and line.

NOTE: We should consider printing the log priority in the non-debug
version as well.

pmmccorm/kmod,Distrotech/kmod,lucasdemarchi/kmod,Distrotech/kmod,pmmccorm/kmod,lpereira/kmod,lpereira/kmod,lucasdemarchi/kmod,lucasdemarchi/kmod,pmmccorm/kmod,Distrotech/kmod,lpereira/kmod