[lldb] Fix a warning

This patch fixes:

  lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp:53:32: error:
  field 'm_thread_reg_ctx_sp' will be initialized after field
  'm_thread_name' [-Werror,-Wreorder-ctor]

Author: kazutakahirata

lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp

@@ -50,7 +50,7 @@ using namespace lldb_private;
 
 // Construct a Thread object with given data
 ThreadElfCore::ThreadElfCore(Process &process, const ThreadData &td)
-    : Thread(process, td.tid), m_thread_reg_ctx_sp(), m_thread_name(td.name),
+    : Thread(process, td.tid), m_thread_name(td.name), m_thread_reg_ctx_sp(),
       m_gpregset_data(td.gpregset), m_notes(td.notes),
       m_siginfo(std::move(td.siginfo)) {}