swiftlint: change configuration

Ignore generated files and use swiftlint only in debugging
configuration.

Change-Id: I356afd1e55923ed1b907dfa1f10212e2b6afa5e9
Reviewed-by: Andreas Traczyk <andreas.traczyk@savoirfairelinux.com>

Ring/.swiftlint.yml

@@ -7,6 +7,7 @@ opt_in_rules: # some rules are only opt-in
 excluded: # paths to ignore during linting. Takes precedence over `included`.
   - Carthage
   - Pods
+  - Ring/Constants
 
 force_cast: warning # implicitly
 force_try:

Ring/Ring.xcodeproj/project.pbxproj

@@ -1224,7 +1224,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "if which swiftlint > /dev/null; then\n    swiftlint\nelse\n    echo \"warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint\"\nfi";
+			shellScript = "if [ \"${CONFIGURATION}\" != \"Release\" ]; then\n    if which swiftlint > /dev/null; then\n        swiftlint\n    else\n        echo \"warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint\"\n    fi\nfi";
 		};
 		1ABE07C41F0D779F00D36361 /* ⚙️ SwiftGen Code Generation */ = {
 			isa = PBXShellScriptBuildPhase;