JS: add tests for two libraries and js-file with two modules

compiler/tests/org/jetbrains/kotlin/integration/AntTaskJsTest.java

@@ -127,6 +127,16 @@ public class AntTaskJsTest extends AntTaskBaseTest {
         doJsAntTest("jslib-example.js");
     }
 
+    @Test
+    public void simpleWithStdlibAndTwoJsFilesAsLibraries() throws Exception {
+        doJsAntTest("jslib-example1.js", "jslib-example2.js");
+    }
+
+    @Test
+    public void simpleWithStdlibAndJsFilesWithTwoModulesAsLibrary() throws Exception {
+        doJsAntTest("jslib-example.js");
+    }
+
     @Test
     public void simpleWithMainFQArgs() throws Exception {
         doJsAntTest();