fix test_fused_elemwise_activation_op time out error

Author: DannyIsFunny

python/paddle/fluid/tests/unittests/CMakeLists.txt

@@ -845,7 +845,7 @@ set_tests_properties(test_dygraph_multi_forward PROPERTIES TIMEOUT 120)
 set_tests_properties(test_norm_op PROPERTIES TIMEOUT 120)
 set_tests_properties(test_imperative_ocr_attention_model PROPERTIES TIMEOUT 120)
 set_tests_properties(test_imperative_mnist PROPERTIES TIMEOUT 120)
-set_tests_properties(test_fused_elemwise_activation_op PROPERTIES TIMEOUT 150)
+set_tests_properties(test_fused_elemwise_activation_op PROPERTIES TIMEOUT 270)
 set_tests_properties(test_gru_op PROPERTIES TIMEOUT 200)
 set_tests_properties(test_layer_norm_op PROPERTIES TIMEOUT 150)
 set_tests_properties(test_pool3d_op PROPERTIES TIMEOUT 150)