Fixed "process launch --tty" on MacOSX.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@202535 91177308-0d34-0410-b5e6-96231b3b80d8
Be sure to propagate the error back out SBTarget::Attach() when we fail to launch debugserver as root.

<rdar://problem/15669788>



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@202536 91177308-0d34-0410-b5e6-96231b3b80d8