Roll libxml from a46e85f6 to dea91c97

Bug: 934413
Change-Id: I45639a7fe29b7a4ce50547f32e89e486c4e0c1e1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3069724
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#908466}
NOKEYCHECK=True
GitOrigin-RevId: 2ae577a01307a2c4c7ea1bd57eaa0c561e93bf98
7 files changed