Kotlin: extract protected modifier from java class files

Author: tamasvajk

java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt

@@ -231,7 +231,7 @@ open class KotlinFileExtractor(
                             // default java visibility (top level)
                         }
                         JavaVisibilities.ProtectedAndPackage -> {
-                            // default java visibility (member level)
+                            addModifiers(id, "protected")
                         }
                         else -> logger.errorElement("Unexpected delegated visibility: $v", elementForLocation)
                     }

java/ql/integration-tests/posix-only/kotlin/java_modifiers/test.expected

@@ -1,2 +1,2 @@
-| extlib.jar/extlib/A.class:0:0:0:0 | m |  |
+| extlib.jar/extlib/A.class:0:0:0:0 | m | protected |
 | test.kt:4:12:4:22 | m | override, protected |