[PATCH] gold/arm.cc: Output mapping symbol for PLT code

[Cary Coutant]

> gold/ChangeLog:
>
> 2015-02-09  Will Newton  <will.newton@linaro.org>
>
>         PR gold/13321
>         * arm.cc (Target_arm::make_plt_section): Create an ARM
>         state mapping symbol at the start of the PLT.

This is OK. Thanks!

-cary