[automerger] RESTRICT AUTOMERGE: Update libxml2 to 2.9.8 am: a50550f8 am: 095b37ab am: 3da2abd3 skipped: aca7e898 am: 4a01492c am: 1c1fb5ba Change-Id: I516caef0de6d0ac52de9c7fa0a22e59e974dc2ef