Misattributed parent with accurate line number

[nolanmar511]

Profiling with agent from PR #258
This is the script I profiled (I ran with --noturbo-inlining):
busybench-3.txt

This is the javascript object I return from the binding: parent-wrong.txt.
The function f2 is a a child of busyloop, in this, so it's not just and issue with serialization. There's a node where f2's line number is 46 (the line number from which f1 is called)

Here's a graph of the profile:

@psmarshall -- any ideas?

[nolanmar511]

The line number for the sample with the strange parent is the line number of the function's declaration.