Make a mandatory call to DestroyThread() in ~LinuxThread().

llvm-svn: 123583
diff --git a/lldb/source/Plugins/Process/Linux/LinuxThread.h b/lldb/source/Plugins/Process/Linux/LinuxThread.h
index 7e30f0a..c7f29ca 100644
--- a/lldb/source/Plugins/Process/Linux/LinuxThread.h
+++ b/lldb/source/Plugins/Process/Linux/LinuxThread.h
@@ -29,6 +29,8 @@
 public:
     LinuxThread(lldb_private::Process &process, lldb::tid_t tid);
 
+    virtual ~LinuxThread();
+
     void
     RefreshStateAfterStop();