[BUG] cannot use retrowrite with binary compiled with gcc or g++

**Description**
retrowrite print no issue when runned on binary compiled with gcc but when I try to assemble the generated assembly with gcc I get this error:
```
/usr/bin/ld:hello.asm: file format not recognized; treating as linker script
/usr/bin/ld:hello.asm:1: syntax error
collect2: error: ld returned 1 exit status
```

**Environment:**

OS: 5.14.21-2-MANJARO x86_64 GNU/Linux
GCC: gcc (GCC) 11.2.0
clang:13.0.1
retrowrite at commit: 7c230bc

I tried with a simple hello world program:
```
#include
#include

int main(int argc, char *argv[])
{
printf("Hello, World!\n");

return 0;
}
```
And compile it with gcc: ```gcc -O0 -ggdb -Wall -Wpedantic -Wextra -fPIC -fPIE -pie hello.c -o hello ```
then ```./retrowrite hello hello.asm```
``` gcc hello.asm -o hello_instrumented``` => error
note that ``` clang hello.asm -o hello_instrumented``` seems to work on some files

Start by reproducing the issue with hello.c, the reported GCC command, and retrowrite hello hello.asm. Compare the behavior of gcc hello.asm and clang hello.asm, then trace the retrowrite command's generated hello.asm output. Done means GCC and G++ can assemble and link the generated assembly for the reported case.

Written by the indexing model from the issue text.