Update ExecuTorch cpuinfo generate-wrapper script (#58)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/58

Current there is an error with cpuinfo build in executorch updating the following line in the generate-wrapper script and regenerating seems to fix

Reviewed By: larryliu0820

Differential Revision: D48277357

fbshipit-source-id: 2a7e63d78b9da2cca85281b07d9d0d7b38fec65f