Fix symbols

Tries to fix #929 

Now it's working like this:

```
[0x00000064]> pdf@0x0000216b
╒ (fcn) sym.test_search_engine 45
│          0x0000216b    8b9760020000 mov edx, [rdi+0x260] ; 0x00000260 
│          0x00002171    48c7c000000. mov rax, 0x0  ;  RELOC 32 search_engines_ip_array
│          ; JMP XREF from 0x00002193 (unk)
│          0x00002178    483b10       cmp rdx, [rax]
│      ┌─< 0x0000217b    7c0c         jl 0x2189
│      │   0x0000217d    483b5008     cmp rdx, [rax+0x8]
│     ┌──< 0x00002181    7f06         jg 0x2189
│     ││   0x00002183    b801000000   mov eax, 0x1
│     ││   0x00002188    c3           ret
│     └└   ; JMP XREF from 0x0000217b (unk)
│     └└   ; JMP XREF from 0x00002181 (unk)
│     └└─> 0x00002189    4883c010     add rax, 0x10
│          0x0000218d    483d00000000 cmp rax, 0x0  ;  RELOC 32 search_engines_ip_array
│          0x00002193    75e3         jne 0x2178
│          0x00002195    31c0         xor eax, eax
╘          0x00002197    c3           ret
[0x00000064]> 
```

Cc @jvoisin @XVilka