Patch from dawn@burble.org to build on linux!

llvm-svn: 141593
diff --git a/lldb/source/Plugins/Process/Linux/ProcessLinux.h b/lldb/source/Plugins/Process/Linux/ProcessLinux.h
index aa31e77..713e8ba 100644
--- a/lldb/source/Plugins/Process/Linux/ProcessLinux.h
+++ b/lldb/source/Plugins/Process/Linux/ProcessLinux.h
@@ -129,6 +129,10 @@
     virtual uint32_t
     UpdateThreadListIfNeeded();
 
+    uint32_t
+    UpdateThreadList(lldb_private::ThreadList &old_thread_list, 
+                     lldb_private::ThreadList &new_thread_list);
+
     virtual lldb::ByteOrder
     GetByteOrder() const;