Upgrade f2fs-tools to efcff4bc169fbcb7276769ab0ad5444b1df33a70

This project was upgraded with external_updater.
Usage: tools/external_updater/updater.sh update external/f2fs-tools
For more info, check https://cs.android.com/android/platform/superproject/+/main:tools/external_updater/README.md

Test: TreeHugger
Change-Id: Iceef0be15bf6455b7d664ad99f30555da2b544b8