The histograms currently mostly contain very small modules (having
0 MB generated and 0 MB freed). Many of those are asm.js modules.
Just recording the modules that are actually interesting for wasm
code GC will give us more meaningful data.

R=mstarzinger@chromium.org

Bug: v8:8217
Change-Id: I1d9ba8134c2f3617f896afc42dc9e87c7852c319
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1611679Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61505}