warnings: Fix a bunch of -Wreorder problems.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@143381 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/Driver.cpp b/tools/driver/Driver.cpp
index 856c08b..1f5e485 100644
--- a/tools/driver/Driver.cpp
+++ b/tools/driver/Driver.cpp
@@ -378,10 +378,10 @@
     m_debug_mode (false),
     m_print_version (false),
     m_print_help (false),
-    m_use_external_editor(false),
     m_wait_for(false),
     m_process_name(),
     m_process_pid(LLDB_INVALID_PROCESS_ID),
+    m_use_external_editor(false),
     m_seen_options()
 {
 }