debuggerd: fix missed use of ptrace(PTRACE_ATTACH). am: 8b6b654a5f am: fe59793375 am: 073f731836 am: 647ec18a9d  -s ours am: 364188b9d8 am: faa7e41a7f am: d982f121c3
am: a665470fcd

Change-Id: I5311123d137e369ce00ecde3052037058616bca6