lab12 32bits -> 64bits

[Nastyst16]

Prerequisite Checklist

• Read the contribution guidelines regarding submitting new changes to the project;
• Tested your changes against relevant architectures and platforms;
• Updated relevant documentation (if needed).

Laboratory 12 from 32bits to 64 bits

Description of changes

Updated all the tasks to 64bits:

• updated binaries
• updated makefiles
• tested the changes
• updated the documentation, readmes
• "feeling-chained" task remains on 32bit due to didactic reasons

[teodutu]

Thanks for the PR. Functionally, most of the tasks seem alright. I'll test them more thoroughly after you do the following:

• Change your line endings from DOS (\r\n) to Unix (\n). Use dos2unix <file-name>.
• Look at the linter failures [1] and fix them
• Make all .sh scripts executable again. I think this and the first error come from WSL, which by default adds DOS line endings and mounts everything as rw-r--r--.
• Recompile the binary for feeling-chained to 64 bits
• rip-my-buffers-off/solution/exploit.sh still uses the 32-bit address and offset. Update it like solve.sh
• Squash your commits into a single one and reword it like so:

labs/lab-12: Add 64-bit version

<Describe your changes here>

<Your signed-off-by line here>

Let me know if you have any questions.

[1] https://github.com/cs-pub-ro/hardware-software-interface/pull/129/checks