Fix building AVX512 Intel-syntax assembly with x86-64 clang
* cipher/asm-common-amd64.h (spec_stop_avx512_intel_syntax): New. * cipher/poly1305-amd64-avx512.S: Use spec_stop_avx512_intel_syntax instead of spec_stop_avx512. * cipher/sha512-avx512-amd64.S: Likewise.
- Reported-by: Clemens Lang <cllang@redhat.com>
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>