Exclude build/ from linting
Exclude build/ from linting

The build/ directory holds breakpad-client-related build stuff that's
external to this project, but has a bunch of Python files that have
linting issues. This excludes them.

mozilla/socorro,lonnen/socorro,lonnen/socorro,mozilla/socorro,lonnen/socorro,mozilla/socorro,mozilla/socorro,mozilla/socorro,mozilla/socorro,lonnen/socorro