Fix bug causing FileSpec::GetPath() to crash with a null dest.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@215262 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a bug where SetFilePermissions was calling MakeDirectory.

This appears to have been a copy / paste error.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@215265 91177308-0d34-0410-b5e6-96231b3b80d8