fix function name to starpu_data_unregister_submit() and starpu_data_invalidate_submit()

ChangeLog

@@ -100,7 +100,7 @@ New features:
   * Performance models measurements can now be provided explicitly by
     applications.
   * Capability to emit communication statistics when running MPI code
-  * Add starpu_unregister_submit, starpu_data_acquire_on_node and
+  * Add starpu_data_unregister_submit, starpu_data_acquire_on_node and
     starpu_data_invalidate_submit
   * New functionnality to wrapper starpu_insert_task to pass a array of
 	data_handles via the parameter STARPU_DATA_ARRAY

doc/doxygen/chapters/07data_management.doxy

@@ -74,7 +74,7 @@ data should be thrown away. If the handle is not to be reused, it can be
 unregistered:
 
 \code{.c}
-starpu_unregister_submit(handle);
+starpu_data_unregister_submit(handle);
 \endcode
 
 actual unregistration will be done after all tasks working on the handle
@@ -83,7 +83,7 @@ terminate.
 If the handle is to be reused, instead of unregistering it, it can simply be invalidated:
 
 \code{.c}
-starpu_invalidate_submit(handle);
+starpu_data_invalidate_submit(handle);
 \endcode
 
 the buffers containing the current value will then be freed, and reallocated