JS declarations: added eval, typeof, undefined.

#KT-4136 Fixed

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

@@ -5,22 +5,34 @@ import java.util.*;
 native
 public val <T> noImpl: T = throw Exception()
 
+native
+public fun eval(expr: String): dynamic = noImpl
+
+native
+public fun typeof(a: Any?): String = noImpl
+
+native
+public val undefined: Nothing? = noImpl
+
 // Drop this after KT-2093 will be fixed and restore MutableMap.set in Maps.kt from MapsJVM.kt
 /** Provides [] access to maps */
 [suppress("BASE_WITH_NULLABLE_UPPER_BOUND")]
 native public fun <K, V> MutableMap<K, V>.set(key: K, value: V): V? = noImpl
 
-library("println")
+library
 public fun println() {}
-library("println")
+library
 public fun println(s : Any?) {}
-library("print")
+library
 public fun print(s : Any?) {}
+
 //TODO: consistent parseInt
-native public fun parseInt(s: String, radix: Int = 10): Int = noImpl
+native
+public fun parseInt(s: String, radix: Int = 10): Int = noImpl
 library
 public fun safeParseInt(s : String) : Int? = noImpl
 library
 public fun safeParseDouble(s : String) : Double? = noImpl
 
-native public fun js(code: String): dynamic = noImpl
+native
+public fun js(code: String): dynamic = noImpl