[automerger] RESTRICT AUTOMERGE: Update libxml2 to 2.9.8 am: a50550f8 am: 095b37ab am: 3da2abd3 skipped: aca7e898 am: 4a01492c am: 1c1fb5ba am: eaf22219 Change-Id: I5e013ce252a32c3cbdbc9a48a3dd33ff634de8d8