Write a toy strace and gdb

I recently wrote a deep dive in to both strace [1] and Linux system calls [2] which may be interesting to folks reading this great article.

[1]: https://blog.packagecloud.io/eng/2016/02/29/how-does-strace-...

[2]: https://blog.packagecloud.io/eng/2016/04/05/the-definitive-g...

[0] https://github.com/dtrace4linux/linux

[1] http://python-ptrace.readthedocs.io/en/latest/