futility: updater: correct the rootkey in manifest.json For customization projects, the bios image should be patched by model first, then the gbb got from the image could be correct. Reason: In the function, patch_image_by_model, it will apply the rootkey, vblock_a and vblock_b of the customization project to the gbb part of the image. This change moves the function "find_gbb" to the position after the function "patch_image_by_model" is called. BUG=b:188861251 BRANCH=none TEST=build Change-Id: I5d80405a2a3b0ecc45e86ca3322b328479b83702 Signed-off-by: Isaac Lee <[email protected]> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2929924 Reviewed-by: Hung-Te Lin <[email protected]>