Update to libxml2 2.9.4 by merging commit 'd8083bf7' into klp-dev. am: 312a2fc2 am: 7e8d493a am: 688b79dd -s ours am: dcf08c71 am: 4c1605a6 am: 54c98123 -s ours am: 80791df5 am: 148395d4 am: 3b744f8d Change-Id: I6ab25695be0942cfdc498980f8c1a09ae9ee1466