bootstat: bootloader stat files misspelled

(cherry picked form commit 25246ddfe6aa0d92c68ad450e206887147f766b4)

Test: system/core/bootstat/boot_reason_test.sh
Bug: 63736262
Bug: 65843095
Change-Id: I6620c9965f4af8b6a3829f1f4cdcc9b691471a71
1 file changed