updates register.cmd for com interop
updates register.cmd for com interop

git-tfs-id: [https://tfs.codeplex.com/tfs/TFS05/]$/ZXingNet/trunk;C90277

micjahn/ZXing.Net,DHMechatronicAG/ZXing.Net,micjahn/ZXing.Net,DHMechatronicAG/ZXing.Net,DHMechatronicAG/ZXing.Net,micjahn/ZXing.Net