Produce source tarball

build.xml

@@ -249,6 +249,27 @@
     </exec>
     </else> 
     </if>
+
+   <if>
+    <os family="unix"/>
+    <then>
+    <exec executable="tar" failonerror="true" dir=".">
+      <arg value="czf"/>
+      <arg value="${output.folder}/eclipse-paho-mqtt-c-src-incubation-${release.version}.tar.gz"/>
+      <arg value="about.html"/>
+      <arg value="notice.html"/>
+      <arg value="README.md"/>
+      <arg value="CONTRIBUTING.md"/>
+      <arg value="epl-v10"/>
+      <arg value="edl-v10"/>
+      <arg value="Makefile"/>
+      <arg value="build.xml"/>
+      <arg value="src"/>
+      <arg value="test"/>
+      <arg value="Windows Build"/>
+    </exec>
+    </then> 
+   </if>
   </target>
 
   <target name="copy">