staging: usbip: userspace: add name to AUTHORS

Add myself to the AUTHORS file.
Signed-off-by: Nmatt mooney <mfm@muteddisk.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/usbip/userspace/AUTHORS

 Takahiro Hirofuchi
 Robert Leibl
+matt mooney <mfm@muteddisk.com>