[TEST][FLAKY] topi/tests/python/test_topi_math.py round

[tqchen]

http://ci.tvm.ai:8080/blue/rest/organizations/jenkins/pipelines/tvm/branches/master/runs/117/nodes/238/log/?start=0

[tqchen]

could due to different treatment on boundary values(0.5?) However, there is already a check_round option to avoid such cases

[tqchen]

ok, turns out the condition is only for positive values. Will send in a fix.

[tqchen]

Should be fixed by #4211