Currently VSTS is producing duplicate package and they are running into
each other will producing
Today:
Linux x64 build definition: both .deb and .tar.gz
Ubuntu 16.04 build definition: both .deb and .tar.gz (ex.
dotnet-sdk-2.0.0-preview3-006477-linux-x64.tar.gz,
dotnet-sdk-debug-2.0.0-preview3-006477-linux-x64.tar.gz,
dotnet-sdk-internal-2.0.0-preview3-006477-linux-x64.tar.gz)
After this change:
Linux x64: .tar.gz
Ubuntu 16.04: .deb
No change for windows and macOS
Tested on Ubuntu with and without --linux-portable and windows
