[fx_acc] Add mapper for torch.log1p (#63792)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63792
Map `torch.log1p` to `acc_ops.add` + `acc_ops.log`.
Test Plan: buck test mode/opt glow/fb/fx/oss_acc_tracer:test_acc_tracer -- test_log1p
Reviewed By: wushirong
Differential Revision: D30491706
fbshipit-source-id: bcbeddf06131113185d2019cfd7cf5e9193a8a78
