Add buck targets for QNN AOT export (#5476)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/5476

Added the necessary buck targets needed to compile qnn export.
Next steps: Get llama model export to succeed without any errors.

bypass-github-export-checks

Reviewed By: derekxu, cccclai

Differential Revision: D61808158

fbshipit-source-id: c6332c9b3432cc011ae415abd590287844099534