[PATCH] gold: Add endbr64 to IBT TLSDESC PLT entry

[Cary Coutant]

>         PR ld/26972
>         * x86_64.cc (Output_data_plt_x86_64_ibt::tlsdesc_plt_entry): Add
>         endbr64.
>         (Output_data_plt_x86_64_ibt::do_fill_tlsdesc_entry): Adjusted.

This is OK. Thanks!

-cary