Upgrade vboot_reference to 0d49b8fdf002fa9cfa573ca1509ed8a1a0cf26d5

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

Test: TreeHugger
Change-Id: I50a18a0a8d169ec783fffd9ee38a25998ccbafff