<rdar://problem/12491420>

Added a new setting that allows a python OS plug-in to detect threads and provide registers for memory threads. To enable this you set the setting:

settings set target.process.python-os-plugin-path lldb/examples/python/operating_system.py

Then run your program and see the extra threads. 

llvm-svn: 166244
diff --git a/lldb/examples/python/operating_system.py b/lldb/examples/python/operating_system.py
index 7f79ea8..b8bff1b 100644
--- a/lldb/examples/python/operating_system.py
+++ b/lldb/examples/python/operating_system.py
@@ -3,7 +3,7 @@
 import lldb
 import struct
 
-class PlugIn(object):
+class OperatingSystemPlugIn(object):
     """Class that provides data for an instance of a LLDB 'OperatingSystemPython' plug-in class"""
     
     def __init__(self, process):