[PATCH] Add support for '-z global'

[Cary Coutant]

> +2014-11-19  Dimitry Ivanov <dimitry@google.com>
> +
> +       * layout.cc (Layout::finish_dynamic_section): When '-z global'
> +       is specified set DF_1_GLOBAL in DT_FLAGS_1 flags.
> +       * options.h (General_options): New -z option (global).

This is OK. Thanks!

Do you have commit access, or do you want me to commit it for you?

-cary