* Declare the Offset variable to be included in 
     activity.c generated file.

 - backends/ocarina-backends-po_hi_c-activity.adb
   * Call __po_hi_task_wait_offset when the task
     use the Dispatch_Offset property

 - backends/ocarina-backends-po_hi_c-runtime.ads
   * Declare the __po_hi_task_wait_offset function
     of PolyORB-HI-C


git-svn-id: https://tecsw.estec.esa.int/svn/taste/trunk/ocarina@4908 129961e7-ef38-4bb5-a8f7-c9a525a55882