- Add bench and compcert execution platform
 
 * ocarina/src/backends/ocarina-backends-properties.adb
   ocarina/src/backends/ocarina-backends-properties.ads
   - Supports the handling of new platform values

 * ocarina/src/backends/ocarina-backends-po_hi_c.adb
   ocarina/src/backends/ocarina-backends-po_hi_c-activity.adb
   ocarina/src/backends/ocarina-backends-c_tree-nutils.adb
   ocarina/src/backends/ocarina-backends-c_tree-nutils.ads
   ocarina/src/backends/ocarina-backends-po_hi_c-runtime.ads
   ocarina/src/backends/ocarina-backends-c_common-mapping.adb
   ocarina/src/backends/ocarina-backends-c_common-mapping.ads
   ocarina/src/backends/ocarina-backends-po_hi_c-main.adb
   - Generate code compliant with compcert





git-svn-id: https://tecsw.estec.esa.int/svn/taste/trunk/ocarina@2671 129961e7-ef38-4bb5-a8f7-c9a525a55882