[Bug target/86486] GCC 8 stack clash protection on AArch64 is incomplete

[tnfchris at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86486

--- Comment #10 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Hi Martin,

the intention is to backport, I'm still working on permission to do so.