When stubbing out source line information emission for Windows, the
ARM64 Windows branch was missed. This change copies the x86/x64 stubs
as appropriate.

Bug: chromium:893460,v8:8870

R=jgruber@chromium.org

Bug: chromium:893460,v8:8870
Change-Id: I1416b602a4f96a68c37fdeeb816ce1ce33b12407
Reviewed-on: https://chromium-review.googlesource.com/c/1453637
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59817}