[Bug ipa/105625] Support .llvm_addrsig section

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105625

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Rui Ueyama from comment #3)
> I think we can implement the `.addrsig` support to the assembler, but I
> wonder if GCC will support it once the GNU assembler gains the feature?

Yes I think it will, shouldn't be too hard to implement because IPA cgraph
already has that information and uses it for ICF inside GCC.