ignore a race which does not actually pose problem

tools/valgrind/starpu.suppr

@@ -90,3 +90,12 @@
    fun:_starpu_load_bus_performance_files
    ...
 }
+
+{
+   This is racy, but we don't care, if the function was called a bit earlier we would have had a different value
+   Helgrind:Race
+   fun:  _starpu_fifo_empty
+   fun: pop_task_eager_policy
+   ...
+}
+