Update test

Author: kparzysz

flang/test/Lower/OpenMP/atomic-privatize.f90

@@ -8,7 +8,7 @@
 
 !CHECK: omp.task private(@_QFfredEprv_firstprivate_i32 %{{[0-9]+}}#0 -> %arg0
 !CHECK: %[[DECL:[0-9]+]]:2 = hlfir.declare %arg0 {uniq_name = "_QFfredEprv"}
-!CHECK: omp.atomic.update %[[DECL]]#0
+!CHECK: omp.atomic.update memory_order(relaxed) %[[DECL]]#0
 
 integer function fred
   integer :: prv