libxml2: upgraded package to upstream

Upgraded dev-libs/libxml2 to version 2.9.8 on amd64

BUG=b:79911144
TEST=emerge-lakitu libxml2

Change-Id: I4fdbf6283b803d9e366a04e75f49839983517434
Reviewed-on: https://chromium-review.googlesource.com/1065137
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Commit-Queue: Daniel Wang <wonderfly@google.com>
Tested-by: Daniel Wang <wonderfly@google.com>
5 files changed