Fix duplicate symbols error in external/vboot_reference am: 00f96d2a69 am: 7b542b1691

Original change: https://android-review.googlesource.com/c/platform/external/vboot_reference/+/2658076

Change-Id: I217c12bbfde8f961ffa3e1ace58d101fd26004d3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>