Don't retry the Connect when starting up debugserver if the reason for the previous failure was
EINTR.  That means the user was trying to interrupt us, and we should just stop instead.

<rdar://problem/13184758>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@183577 91177308-0d34-0410-b5e6-96231b3b80d8
Don't set stdin to devnull for forked processes

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@183578 91177308-0d34-0410-b5e6-96231b3b80d8
Updating convenience register attach test

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@183580 91177308-0d34-0410-b5e6-96231b3b80d8