Suppressed warning about 'ignoreAllErrors()' that was added to IErrorHandlingPolicy in a more recent ecj editions

test/core/src/lombok/RunTestsViaEcj.java

@@ -85,6 +85,7 @@ public class RunTestsViaEcj extends AbstractRunTests {
 				return false;
 			}
 			
+			@SuppressWarnings("unused") // Added to the interface in later ecj version
 			public boolean ignoreAllErrors() {
 				return false;
 			}