Memaccess stats

Here it is, to count the pruned tasks

runtime/starpu/include/morse_starpu.h

@@ -115,6 +115,7 @@ void RUNTIME_set_reduction_methods(starpu_data_handle_t handle, MORSE_enum dtyp)
 #define RUNTIME_PRUNING_STATS_BEGIN_ACCESS_DECLARATION
 #define RUNTIME_PRUNING_STATS_ACCESS_W(A, Am, An)
 #define RUNTIME_PRUNING_STATS_END_ACCESS_DECLARATION
+#define RUNTIME_PRUNING_STATS_RANK_CHANGED(rank)
 #endif
 
 #define RUNTIME_BEGIN_ACCESS_DECLARATION \