[automerger] RESTRICT AUTOMERGE: Update libxml2 to 2.9.8 am: a50550f81d am: 095b37ab9a am: 3da2abd3a7 skipped: aca7e89827 am: 4a01492cf9 am: 1c1fb5babf am: eaf22219db

Change-Id: I5e013ce252a32c3cbdbc9a48a3dd33ff634de8d8