Export the watchpoint related API (SBWatchpointLocation class and added SBTarget methods)

to the Python interface.

Implement yet another (threre're 3 now) iterator protocol for SBTarget: watchpoint_location_iter(),
to iterate on the available watchpoint locations.  And add a print representation for
SBWatchpointLocation.

Exercise some of these Python API with TestWatchpointLocationIter.py.

llvm-svn: 140595

lldb/scripts/Python/python-extensions.swig

@@ -160,4 +160,11 @@
                 return PyString_FromString (description.GetData());
         }
 }
+%extend lldb::SBWatchpointLocation {
+        PyObject *lldb::SBWatchpointLocation::__repr__ (){
+                lldb::SBStream description;
+                $self->GetDescription (description, lldb::eDescriptionLevelVerbose);
+                return PyString_FromString (description.GetData());
+        }
+}