Exit if the command line is started with "--help".

llvm-svn: 116180
diff --git a/lldb/tools/driver/Driver.cpp b/lldb/tools/driver/Driver.cpp
index b3b1081..13f7fc6 100644
--- a/lldb/tools/driver/Driver.cpp
+++ b/lldb/tools/driver/Driver.cpp
@@ -651,6 +651,7 @@
     if (error.Fail() || m_option_data.m_print_help)
     {
         ShowUsage (out_fh, g_options, m_option_data);
+        exit = true;
     }
     else if (m_option_data.m_print_version)
     {