title: 'No resource identifier found for attribute' error even after using namespace http://schemas.android.com/apk/res-auto
body: <p>Im porting an existing app to gradle build system and got the following error while doing a build from <strong>command line</strong>
  <code>error: No resource identifier found for attribute 'ignore_vertical_scroll' in package 'com.example.dummyapp'</code></p>
  
  <p>Now <code>'ignore_vertical_scroll'</code> is a custom attribute defined in <code>attrs.xml</code> using it as <code>abc:ignore_vertical_scroll="true"</code> in the layout where <code>xmlns:abc="http://schemas.android.com/apk/res-auto"</code> </p>
  
  <p>What I have read till now is that this URI was added in ADT 17.0 to mitigate package name issues in custom components. Not sure how this translates in gradle.</p>