restore use of .type in asm, but use modern @function (vs %function)

[musl] / src / internal / x86_64 / syscall.s

.global __syscall
.type __syscall,@function
__syscall:
        movq %rdi,%rax
        movq %rsi,%rdi
        movq %rdx,%rsi
        movq %rcx,%rdx
        movq %r8,%r10
        movq %r9,%r8
        movq 8(%rsp),%r9
        syscall
        ret