Update legacy_split_clone.go
Update legacy_split_clone.go

Legacy split clone copy data bug fix, which may lead to data Inconsistent
davygeek/vitess,tirsen/vitess,rnavarro/vitess,sougou/vitess,tirsen/vitess,HubSpot/vitess,rnavarro/vitess,HubSpot/vitess,rnavarro/vitess,davygeek/vitess,mahak/vitess,dcadevil/vitess,tinyspeck/vitess,tinyspeck/vitess,dcadevil/vitess,tinyspeck/vitess,mahak/vitess,enisoc/vitess,mattharden/vitess,rnavarro/vitess,HubSpot/vitess,rnavarro/vitess,mattharden/vitess,dcadevil/vitess,tinyspeck/vitess,alainjobart/vitess,mattharden/vitess,alainjobart/vitess,sougou/vitess,HubSpot/vitess,tirsen/vitess,dcadevil/vitess,sougou/vitess,davygeek/vitess,tirsen/vitess,vitessio/vitess,enisoc/vitess,sougou/vitess,alainjobart/vitess,tirsen/vitess,sougou/vitess,mattharden/vitess,vitessio/vitess,mattharden/vitess,vitessio/vitess,HubSpot/vitess,vitessio/vitess,alainjobart/vitess,enisoc/vitess,rnavarro/vitess,mahak/vitess,alainjobart/vitess,davygeek/vitess,tirsen/vitess,HubSpot/vitess,mahak/vitess,alainjobart/vitess,vitessio/vitess,tinyspeck/vitess,mattharden/vitess,davygeek/vitess,tirsen/vitess,tirsen/vitess,sougou/vitess,tirsen/vitess,mahak/vitess,alainjobart/vitess,mattharden/vitess,enisoc/vitess,vitessio/vitess,HubSpot/vitess,alainjobart/vitess,vitessio/vitess,sougou/vitess,rnavarro/vitess,dcadevil/vitess,dcadevil/vitess,enisoc/vitess,davygeek/vitess,enisoc/vitess,mahak/vitess,vitessio/vitess,dcadevil/vitess,mahak/vitess,tinyspeck/vitess,mattharden/vitess,enisoc/vitess,rnavarro/vitess,mattharden/vitess,tinyspeck/vitess,HubSpot/vitess,mahak/vitess,davygeek/vitess,rnavarro/vitess,mattharden/vitess,sougou/vitess