Fix up the dtrace/etw/systemtap infrastructure after the V8 upgrade in
commit 1c7bf24. The win32 changes are untested but can hardly make
things worse because node doesn't build on windows right now.
Fixes#7313 with some luck.
OSX and other DTrace implementations don't support dereferencing
structs in probes. To accomodate that pass members from the struct as
arguments so that DTrace is useful on those systems.