Clean up handling of FreeBSD thread list on Launch / Attach

Instead of directly manipulating the thread list in Launch and Attach,
just rely on RefreshStateAfterStop to populate the initial list.

Review: http://llvm-reviews.chandlerc.com/D1565
llvm-svn: 189889
diff --git a/lldb/source/Plugins/Process/POSIX/ProcessMessage.cpp b/lldb/source/Plugins/Process/POSIX/ProcessMessage.cpp
index 60a29e0..bdb7804 100644
--- a/lldb/source/Plugins/Process/POSIX/ProcessMessage.cpp
+++ b/lldb/source/Plugins/Process/POSIX/ProcessMessage.cpp
@@ -218,6 +218,9 @@
     case eInvalidMessage:
         str = "eInvalidMessage";
         break;
+    case eAttachMessage:
+        str = "eAttachMessage";
+        break;
     case eExitMessage:
         str = "eExitMessage";
         break;