Upgrade toybox to 7768b83385b2fa7bd095f7fa6a118635bfefdcbb am: 9a71c60d33

Original change: https://android-review.googlesource.com/c/platform/external/toybox/+/2987549

Change-Id: I2d9152370ba5d6e34bbe5822777f764a8505c8c9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>