LLDB: update display options once directly after run

The display options like "Use debugging helpers", "Dereference Pointers"
etc are already updated the moment they change while the debugger is
running, but it was missing the initialization at startup.

Change-Id: Id39a38c6646c3c19819e2c122d7f8be285eae09e
Reviewed-by: hjk <hjk121@nokiamail.com>