vendor: add github.com/hanwen/go-fuse/v2@master for mount2

vendor/github.com/hanwen/go-fuse/v2/AUTHORS

@@ -0,0 +1,20 @@
+Adam H. Leventhal <adam.leventhal@gmail.com>
+Daniel Martí <mvdan@mvdan.cc>
+Fazlul Shahriar <fshahriar@gmail.com>
+Frederick Akalin <akalin@gmail.com>
+Google Inc.
+Haitao Li <lihaitao@gmail.com>
+Jakob Unterwurzacher <jakobunt@gmail.com>
+James D. Nurmi <james@abneptis.com>
+Jeff <leterip@me.com>
+Kaoet Ibe <kaoet.ibe@outlook.com>
+Kirill Smelkov <kirr@nexedi.com>
+Logan Hanks <logan@bitcasa.com>
+Maria Shaldibina <mshaldibina@pivotal.io>
+Nick Cooper <gh@smoogle.org>
+Patrick Crosby <pcrosby@gmail.com>
+Paul Jolly <paul@myitcv.org.uk>
+Paul Warren <paul.warren@emc.com>
+Shayan Pooya <shayan@arista.com>
+Valient Gough <vgough@pobox.com>
+Yongwoo Park <nnnlife@gmail.com>