Execute a child process with ptrace enabled. Currently requires Nightly Rust.

Example

```rust,no_run

use std::io;

use spawn_ptrace::CommandPtraceSpawn; use std::process::Command;

fn foo() -> io::Result<()> {

let child = try!(Command::new("/bin/ls").spawn_ptrace()); // call ptrace(PTRACE_CONT, child.id(), ...) to continue execution // do other ptrace things here...

Ok(())

}

```