ChecksumLog.v: one bullet of recover_ok proof using weaker precondition for put_ok
ChecksumLog.v: one bullet of recover_ok proof using weaker precondition for put_ok

mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl