Remove the GetSequenceMutex timeout that isn't being used in the GDB remote plug-in. 

Also fixed the ProcessLinux, ProcessPOSIX and ProcessFreeBSD to have the correct UpdateThreadList() prototype.

llvm-svn: 154603
diff --git a/lldb/source/Plugins/Process/Linux/ProcessLinux.h b/lldb/source/Plugins/Process/Linux/ProcessLinux.h
index 49fdb45..9acbf49 100644
--- a/lldb/source/Plugins/Process/Linux/ProcessLinux.h
+++ b/lldb/source/Plugins/Process/Linux/ProcessLinux.h
@@ -53,7 +53,7 @@
     ProcessLinux(lldb_private::Target& target,
                  lldb_private::Listener &listener);
 
-    virtual uint32_t
+    virtual bool
     UpdateThreadList(lldb_private::ThreadList &old_thread_list, lldb_private::ThreadList &new_thread_list);
     //------------------------------------------------------------------
     // PluginInterface protocol