JS: use external modifier instead of @native annotation

js/js.libraries/src/core/annotations.kt

@@ -20,18 +20,22 @@ import kotlin.annotation.AnnotationTarget.*
 
 @native
 @Target(CLASS, FUNCTION, PROPERTY, CONSTRUCTOR, VALUE_PARAMETER, PROPERTY_GETTER, PROPERTY_SETTER)
+@Deprecated("Use `external` modifier instead")
 public annotation class native(@Deprecated public val name: String = "")
 
 @native
 @Target(FUNCTION)
+@Deprecated
 public annotation class nativeGetter
 
 @native
 @Target(FUNCTION)
+@Deprecated
 public annotation class nativeSetter
 
 @native
 @Target(FUNCTION)
+@Deprecated
 public annotation class nativeInvoke
 
 @native

js/js.libraries/src/core/concurrent.kt

@@ -22,12 +22,15 @@ package kotlin
 // so they annotated as 'native' to avoid warnings/errors from some minifiers.
 // They was reserved word in ECMAScript 2, but is not since ECMAScript 5.
 
-@native
+// Additional note:
+// Although it's reasonable to mark these annotations as `@native` (`external` since 1.1),
+// we prohibit marking annotations this way.
+// TODO: Another workaround is required to remove these annotations from kotlin.js
+
 @Target(AnnotationTarget.PROPERTY, AnnotationTarget.FIELD)
 @Retention(AnnotationRetention.SOURCE)
 public annotation class Volatile
 
-@native
 @Target(AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER)
 @Retention(AnnotationRetention.SOURCE)
 public annotation class Synchronized