mesh: Log information about the on-behalf-of flag
mesh: Log information about the on-behalf-of flag

X-Original-Commit: 12f86834edd55118bf2bee86bcfe3e5c0cc9873f

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble