When the context structure is adjusted in the signal handler then this
updates the state of the CPU on sigreturn.
We check to see if the RIP was adjusted and in this case we will update
the JIT in a potentially unsafe fashion.
This works well enough with signal handlers that effectively just long
jump and not much else.
Fixes wine initial prefix setup where rundl32 expects to do a try-catch
fault capture but infinite loops without this.
Ryan Houdek
2f28548ce4