Emulate stack trace related methods

[CalebFenton]

trafficstars

For the purposes of spoofing stack traces. :facepunch:

More advanced string encryption may check stack traces when decrypting, or to check if the app has been tampered with, etc.

[CalebFenton]

Here's a good test case for once this is implemented: https://github.com/CalebFenton/simplify/issues/99