print graph break in llama -- a different if-else branch (#2493)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/2493

D54969119 added the print to only one of the if branches (line 315-319), but the other branch is also used.

Reviewed By: cccclai

Differential Revision: D55033430

fbshipit-source-id: 4b42fa750245555e353838d2bcca86b689b16c26