Add writeup modifier points for my entries (#123, #118, #69)

[mebeim]

As suggested here, here's an issue to notify that I have uploaded my writeups (here) so you can add the modifier points as needed to my existing submissions:

• ELF 64-bit executable for Linux x86_64 - 112 bytes (needs URL in command line arg) #123
• ELF 32-bit executable for Linux x86 - 82 bytes #118
• PHP - 26 bytes #69

Thank you!