[PATCH] aarch64: update NEWS about branch protection

[Florian Weimer]

* Szabolcs Nagy:

> diff --git a/NEWS b/NEWS
> index 1ef4a0a7a4..0e6ad5edc4 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -70,7 +70,9 @@ Major new features:
>  
>  * AArch64 now supports standard branch protection security hardening
>    in glibc when it is built with a GCC that is configured with
> -  --enable-standard-branch-protection.  This includes branch target
> +  --enable-standard-branch-protection (or if -mbranch-protection=standard
> +  flag is passed when building both GCC target libraries and glibc,
> +  in either case a custom GCC is needed).  This includes branch target
>    identification (BTI) and pointer authentication for return addresses
>    (PAC-RET).  They require armv8.5-a and armv8.3-a architecture
>    extensions respectively for the protection to be effective,

Please clarify if you need to pass the flags in CFLAGS or CC for glibc.
Thanks.

Florian