Upgrade toybox to 96d9f66127d84fba2f56f4754fc302e826968751

This project was upgraded with external_updater.
Usage: tools/external_updater/updater.sh update external/toybox
For more info, check https://cs.android.com/android/platform/superproject/+/main:tools/external_updater/README.md

Test: TreeHugger
Change-Id: I7b47e3a9faac842297b84cba305af77698f96e18