add missing import math

tests/python/relax/test_frontend_from_fx.py

@@ -14,13 +14,15 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+
 import operator
 import pytest
 import torch
 import torch.nn.functional as F
 from torch import fx
 from torch.nn import Module
 import torchvision
+import math
 
 import tvm
 from tvm import relax