Omnisharp not included in Linux build

Our linux build machine does not include the csharp-o/**bin** folder.
1. Running `scripts/npm.sh install` -> csharp-o/**bin** folder nicely gets created on my linux machine.
2. Running `gulp vscode-linux-x64` also nicely creates the csharp-o/**bin** folder on my linux machine.

Something is strange on our build machine
