We need to iterate through the all symbol context ranges returned by
(since #126505) SymbolContext::GetAddressRange. This also includes a fix
to print the function offsets as signed values.
I've also wanted to check that the addresses which are in the middle of
the function do *not* resolve to the function, but that's not entirely
the case right now. This appears to be a separate issue though, so I've
just left a TODO for now.
499d6da3bb