libf2fs: fix build error on Windows am: a0823d077c am: 15936d35f5 am: 95042ab4ba am: 0b28bd7897

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/f2fs-tools/+/11884882

Change-Id: Ie478361edbd71748b477ab8a643d7fce05a6ad8f