add nasm macho64

a/assembler_nasm_macho64.asm

@@ -0,0 +1,17 @@
+global start
+
+section .text
+start:
+    mov         rax, 0x2000004  ; write
+    mov         rdi, 1          ; stdout
+    mov         rsi, msg
+    mov         rdx, msg.len
+    syscall
+
+    mov         rax, 0x2000001  ; exit
+    mov         rdi, 0
+    syscall
+
+section .data
+msg:    db      "Hello, World!", 10
+.len:   equ     $ - msg