added help for the targets field.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@4947 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/tasks/Ant/config.jelly

@@ -7,7 +7,7 @@
       </j:forEach>
     </select>
   </f:entry>
-  <f:entry title="Targets">
+  <f:entry title="Targets" help="/help/ant/ant-targets.html">
     <f:expandableTextbox name="ant.targets" value="${instance.targets}" />
   </f:entry>
   <f:advanced>

war/resources/help/ant/ant-targets.html

+<div>
+  Specify a list of Ant targets to be invoked, or leave it empty to invoke the default ant target
+  specified in the build script. Additionally, you can also this field to specify other Ant options. 
+</div>
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