swiftlint: change configuration

Ignore generated files and use swiftlint only in debugging
configuration.

Change-Id: I356afd1e55923ed1b907dfa1f10212e2b6afa5e9
Reviewed-by: Andreas Traczyk <andreas.traczyk@savoirfairelinux.com>
diff --git a/Ring/.swiftlint.yml b/Ring/.swiftlint.yml
index fab1ed2..d3b6db0 100644
--- a/Ring/.swiftlint.yml
+++ b/Ring/.swiftlint.yml
@@ -7,6 +7,7 @@
 excluded: # paths to ignore during linting. Takes precedence over `included`.
   - Carthage
   - Pods
+  - Ring/Constants
 
 force_cast: warning # implicitly
 force_try: