JS backend: fixed String.split for the case when using regexp.

Added(overload) String.split with limit parameter.

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

@@ -3,15 +3,18 @@ package java.lang
 import java.io.IOException
 import js.library
 
+library("splitString")
+public fun String.split(regex : String) : Array<String> = js.noImpl
+
+library("splitString")
+public fun String.split(regex : String, limit: Int) : Array<String> = js.noImpl
+
 library
 open public class Exception(message: String? = null) : Throwable() {}
 
 library
 open public class RuntimeException(message: String? = null) : Exception(message) {}
 
-library("splitString")
-public fun String.split(regex : String) : Array<String> = js.noImpl
-
 library
 public class IllegalArgumentException(message: String? = null) : Exception() {}