gcc-8: arm64/kvm/pauth.: Error: unknown architectural extension `pauth'

The arm64 defconfig build failed with gcc-8 and passed with gcc-13.

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Build log: --- /tmp/ccSUNNZy.s: Assembler messages: /tmp/ccSUNNZy.s:3159: Error: unknown architectural extension `pauth' make[5]: *** [scripts/Makefile.build:244: arch/arm64/kvm/pauth.o] Error 1

Steps to reproduce: --- # tuxmake --runtime podman --target-arch arm64 --toolchain gcc-8 --kconfig defconfig

Links: - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240422/tes... - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240422/tes... - https://storage.tuxsuite.com/public/linaro/lkft/builds/2fRe0ZWWmise7cetIz0aX...

-- Linaro LKFT https://lkft.linaro.org