.rdata is the default section which hosts read-only data for COFF. Use this
default section name avoids creating a new .rodata section with explicit
read-only property.

Bug: chromium:919180
Change-Id: I7325cbcfdb142b3ee15de93b7881f755c365d6e6
Reviewed-on: https://chromium-review.googlesource.com/c/1407240
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58764}