fix patched add example

Author: trdavidt

tests/binaries/patched_binary_translate_add.S

@@ -1,18 +1,29 @@
-sub sp, sp, -32
+.text
+
+.global _start
+
+_start:
+bl main
+mov x8, #93
+svc #0
+
+main:
+sub sp, sp, 32
 str lr, [sp, 24]
-str x5, [sp, 16]
-add w5, wsp, 32
+str fp, [sp, 16]
+add fp, sp, 32
 mov x12, 3
-str w12, [x5, -20]
+str w12, [fp, -20]
 mov x12, 4
-str w12, [x5, -24]
-ldr w12, [x5, -20]
+str w12, [fp, -24]
+ldr w12, [fp, -20]
 add x11, x12, 0
-ldr w12, [x5, -24]
+ldr w12, [fp, -24]
 add w12, w11, w12
 sxtw x12, w12
-add x7, x12, 0
+add x0, x12, 0
 ldr lr, [sp, 24]
-ldr x5, [sp, 16]
+ldr fp, [sp, 16]
 add sp, sp, 32
-blr lr
+ret
+