Fix building futility against musl am: edce551727 am: 2f12db35a6 am: 18ac24edae am: e535c25a5d

Original change: https://android-review.googlesource.com/c/platform/external/vboot_reference/+/1969999

Change-Id: I1c2d8a3c2ca1b9406a0ac1e7ecf4a16ea4e912ce