Adding log call on giou loss (#5690)

torchvision/ops/giou_loss.py

 import torch
 from torch import Tensor
 
+from ..utils import _log_api_usage_once
+
 
 def _upcast(t: Tensor) -> Tensor:
     # Protects from numerical overflows in multiplications by upcasting to the equivalent higher type
@@ -41,6 +43,8 @@ def generalized_box_iou_loss(
         A Metric and A Loss for Bounding Box Regression:
         https://arxiv.org/abs/1902.09630
     """
+    if not torch.jit.is_scripting() and not torch.jit.is_tracing():
+        _log_api_usage_once(generalized_box_iou_loss)
 
     boxes1 = _upcast(boxes1)
     boxes2 = _upcast(boxes2)