Include filename in linter errors

Commit f0d96f2 claimed to include the name of the file the linter failed
on but didn't actually. Change it to actually include the name of the
file.

Change-Id: I478231883a0f3e02ea1bc15ddb83274cb9aba76a
Reviewed-on: https://gerrit.causes.com/30840
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>