fix ut test=develop

Author: gongweibao

paddle/fluid/operators/collective/c_allreduce_sum_op_npu_test.cc

@@ -175,7 +175,8 @@ void TestHCCLAllReduceOp(f::Scope* scope, const p::DeviceContext& ctx,
 
   PrintDebugInfo("output data", out_vec);
 
-  EXPECT_TRUE((static_cast<float>(out_vec[0]) - 65504) < 0.1);
+  float diff = static_cast<float>(out_vec[0]) - 65504;
+  EXPECT_TRUE(diff < 0.1 && diff > -0.1);
   EXPECT_EQ(out_vec.size(), init.size());
   for (uint32_t i = 1; i < 10; i++) {
     EXPECT_EQ(out_vec[i], static_cast<paddle::platform::float16>(3.0));