[Documentation]: Fix User API Example

[jrmadsen]

Description of errors

Code provided here needs to be compiled with debug symbols in order to produce a valid perfetto trace. It needs to be noted in compilation section above and a note needs to be made about this issue until Dyninst is updated.

Without debug symbols, it appears that the loop exit instrumentation gets corrupted and the user is left with a trace where none of the last trace entries end on the main thread.

Attach any links, screenshots, or additional evidence you think will be helpful.

No response