[Reproducer] Capture the debugger's working directory

This patch extends the reproducer to capture the debugger's current
working directory. This information will be used later to set the
current working directory of the VFS.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@375059 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed