OptionValueProperties::DeepCopy (): return empty value to avoid compilation error on MSVC (even if assert).

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190069 91177308-0d34-0410-b5e6-96231b3b80d8
Use getwd(0) on FreeBSD as on OS X.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190070 91177308-0d34-0410-b5e6-96231b3b80d8