fix op not scriptable
Summary: Fix torch.sort, min/max, torch.numel after quantization not scriptable
Test Plan: python3 test/test_quantization.py TestQuantizeFxOps.test_general_shape_ops
Reviewed By: jerryzh168
Differential Revision: D33467184
Pulled By: terrychenism
fbshipit-source-id: 13775ab36d4007978df48c9af71d83398fce5161
