Update darlingserver

LLDB can now launch processes (with `process launch`) but breakpoints
don't work and the debugserver seems to not get a notification when the
process dies (so LLDB just waits forever after the process exits).

Interestingly, `process launch --stop-at-entry` *does* stop the process
at entry, but LLDB reports "no executable module" (or something like
that), so there's no debug info available. Sounds like LLDB isn't
getting the process' dyld_all_image_infos properly.