Need printf hook to print to klog

[Cryptogenic]

Samples from the toolchain and what not that printf() cannot be captured by reading kernel log. Adding the hook for this into Mira would add convenience here.

[idc]

https://gist.github.com/idc/aada292e9e26b4fd7ce1947510a09571

Quick & dirty version. @Al-Azif provided some other version offsets in comment.