[automerger] RESTRICT AUTOMERGE: Update libxml2 to 2.9.8 am: a50550f8 am: 095b37ab am: 3da2abd3 skipped: aca7e898 am: 4a01492c am: 1c1fb5ba am: eaf22219 am: 9bf8ef0b skipped: 19ebab4b Change-Id: I0c0edb98fd0be490ea07ff230f16b262736b07cd