Apparently it can happen that the variable to which we're restoring to has a
two-byte name corresponding to the one-byte name we expect. Modify the debug-mode
name check to allow this.

BUG=v8:7428

Change-Id: I94c56a4b2de3c58b50246fecaead332b0f9679b4
Reviewed-on: https://chromium-review.googlesource.com/911801Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51304}