[Bug libitm/124237] aarch64: libitm is not marked with GCS when built with -mbranch-protection=standard

[ykhrustalev at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124237

--- Comment #1 from Yury Khrustalev <ykhrustalev at gcc dot gnu.org> ---
Also affects GCC 15