Use other version of JS ast by develar: changes to jars and xmls.

Adapted from https://github.com/develar/kotlin/commit/d3521123a6e4d551b30743b68b6bb23b9678553b.

js/js.tests/testLib/src/closure-compiler_mod.txt

@@ -0,0 +1,14 @@
+1) Deleted package com.google.javascript.jscomp.ant to avoid dependency on ant.jar. 
+2) jarjar-ed it:
+    <target name="jarjarClosureCompiler">
+        <taskdef name="jarjar" classname="com.tonicsystems.jarjar.JarJarTask" classpath="${basedir}/dependencies/jarjar.jar"/>
+
+        <delete file="${output}/closure-compiler.jar" failonerror="false"/>
+        <jarjar jarfile="${output}/closure-compiler.jar">
+            <zipgroupfileset dir="${basedir}" includes="closure-compiler.jar" />
+
+            <rule pattern="com.google.common.**" result="closurecompiler.internal.com.google.common.@1"/>
+            <rule pattern="com.google.protobuf.**" result="closurecompiler.internal.com.google.protobuf.@1"/>
+            <rule pattern="org.mozilla.classfile.**" result="closurecompiler.internal.org.mozilla.classfile.@1"/>
+        </jarjar>
+    </target>