Fix passing non-string value to print/println in node.js

See KT-15484

js/js.translator/testData/box/native/print.js

@@ -3,7 +3,7 @@ var buffer = "";
 function writeToBuffer(a) {
     var type = typeof a;
     if (type === "undefined") return;
-    if (type !== "string") throw Error("Expected string argument type, but got: " + type);
+    if (type !== "string" && !(a instanceof String)) throw Error("Expected string argument type, but got: " + type);
 
     buffer += a;
 }
@@ -16,7 +16,12 @@ function writelnToBuffer(a) {
 var GLOBAL = (0, eval)("this");
 
 GLOBAL.console = {
-    log: writelnToBuffer
+    log: function (a) {
+        if (typeof a !== "undefined") {
+            buffer += a
+        }
+        buffer += "\n";
+    }
 };
 
 GLOBAL.outputStream =  {

js/js.translator/testData/box/native/print.kt

@@ -6,7 +6,7 @@ val EXPECTED = """Hello, World
 ^^
 ^^
 ***
-####
+##null23##
 """
 
 val EXPECTED_NEWLINE_FOR_EACH = """Hello
@@ -18,6 +18,8 @@ val EXPECTED_NEWLINE_FOR_EACH = """Hello
 
 ***
 ##
+null
+23
 ##
 
 """
@@ -35,6 +37,8 @@ fun test(expected: String, initCode: String, getResult: () -> String) {
     println()
     println("***")
     print("##")
+    print(null)
+    print(23)
     print("##")
     println()