<rdar://problem/13198919>

Try and reap process when sending the "k" packet to avoid a race condition. We now wait for at most 1 second to reap the child process that we are killing.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@178726 91177308-0d34-0410-b5e6-96231b3b80d8