Honestly, I don't think that a Muslim even care about it. To them, Muhammad has more honor and credence than Jesus. To them, Jesus didn't even die on the cross but Judas took his place.
To Sister_T:
But, to Muslims, Jesus was a prophet and is coming back one day.
Yes, they believe that Jesus didn't die on a cross, but went to heaven bodily. If Jesus's ossuary was found, to them, that would be a slam on their belief that He is alive in heaven, bodily.