Export builder package

Author: DayS

AndroidAnnotations/androidannotations-api/META-INF/MANIFEST.MF

@@ -8,6 +8,7 @@ Export-Package: org.androidannotations.annotations,
  org.androidannotations.annotations.rest,
  org.androidannotations.annotations.sharedpreferences,
  org.androidannotations.api,
+ org.androidannotations.api.builder,
  org.androidannotations.api.rest,
  org.androidannotations.api.sharedpreferences,
  org.androidannotations.api.view