rdar://problem/11811338

Add 'attach <pid>|<process-name>' command to lldb, as well as 'detach' which is an alias of 'process detach'.
Add two completion test cases for "attach" and "detach".


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@162573 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed