Fix the broken script in AssertFingerprintOrThumbprint.

Bug: 62252466
Test: Re-generate an incremental OTA that goes from the fingerprint to
      thumbprint, and check the updater-script.
Change-Id: I6e2cbf68cbd22fbcf0d200fc3fdc8a33da510a53
(cherry picked from commit d2d01e519e9fb3b1c4c1f021c72385eaa0b4b9ae)
1 file changed