Log UnityGLTF exceptions when falling back to legacy

[CI BUILD]

Assets/Scripts/ImportGltfast.cs

@@ -131,6 +131,7 @@ private static async Task _ImportUsingUnityGltf(
             catch (Exception e)
             {
                 Debug.LogError("Failed to import using UnityGltf. Falling back to legacy import");
+                Debug.LogError($"UnityGltf Exception: {e}");
                 // Fall back to the older import code
                 GameObject go = _ImportUsingLegacyGltf(localPath, assetLocation);
                 model.CalcBoundsGltf(go);