lldb-dap VSCode extension does not support multi-root workspaces

[award999]

VSCode has a multi-root workspace concept which does not currently work with the lldb-dap extension. The code assumes there is always a workspace folder:

cwd: workspaceFolder!!.uri.fsPath,

which is not the case when a code-workspace file is open. It results is a NPE style error:

[award999]

I have a 2 line fix for this. PR coming

[llvmbot]

@llvm/issue-subscribers-lldb-dap

Author: None (award999)

VSCode has a [multi-root workspace](https://code.visualstudio.com/docs/editing/workspaces/multi-root-workspaces) concept which does not currently work with the lldb-dap extension. The code assumes there is always a workspace folder: ``` cwd: workspaceFolder!!.uri.fsPath, ``` which is not the case when a code-workspace file is open. It results is a NPE style error: