BuildTools: added tests for ant task Kotlin2JsCompilerTask.

compiler/integration-tests/testData/k2jsManySources/bar.kt

@@ -0,0 +1 @@
+fun bar() {}

compiler/integration-tests/testData/k2jsManySources/build.log.expected

@@ -0,0 +1,8 @@
+OUT Buildfile: [TestData]/build.xml
+OUT 
+OUT build:
+OUT [kotlin2js] Compiling [[TestData]/root1,[TestData]/bar.kt,[TestData]/root2/Foo.kt] => [[Temp]/out.js]
+OUT 
+OUT BUILD SUCCESSFUL
+OUT Total time: [time]
+Return code: 0

compiler/integration-tests/testData/k2jsManySources/build.xml

@@ -0,0 +1,14 @@
+<project name="Ant Task Test" default="build">
+  <taskdef resource="org/jetbrains/jet/buildtools/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>
+
+  <target name="build">
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" >
+       <src>
+         <pathelement path="${test.data}/bar.kt"/>
+         <fileset dir="${test.data}/root2">
+           <include name="**/*.kt"/>
+         </fileset>
+       </src>
+    </kotlin2js>
+  </target>
+</project>

compiler/integration-tests/testData/k2jsManySources/root1/main.kt

@@ -0,0 +1,7 @@
+package foo
+
+fun box(): String {
+    Foo()
+    bar()
+    return "OK"
+}

compiler/integration-tests/testData/k2jsManySources/root2/Bar.js

@@ -0,0 +1 @@
+function Bar () {}

compiler/integration-tests/testData/k2jsManySources/root2/Foo.kt

@@ -0,0 +1 @@
+class Foo