totem-video-thumbnailer needs write access to .cache in 16.10

[Franck]

Since I upgraded to 16.10, video preview fail in Nautilus, with this message in the logs:

audit: type=1400 audit(1477301198.204:99): apparmor="DENIED" operation="mknod" profile="/usr/bin/totem-video-thumbnailer" name="/home/franck/.cache/gstreamer-1.0/registry.x86_64.bin.tmpICLVPY" pid=9142 comm="totem-video-thu" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: apparmor 2.10.95-4ubuntu5.1
ProcVersionSignature: Ubuntu 4.8.0-27.29-generic 4.8.1
Uname: Linux 4.8.0-27-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Oct 24 12:13:57 2016
InstallationDate: Installed on 2015-10-04 (385 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20151002)
ProcKernelCmdline: BOOT_IMAGE=/vmlinuz-4.8.0-27-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro noprompt persistent kaslr threadirqs quiet splash vt.handoff=7
SourcePackage: apparmor
Syslog:
 Oct 24 09:02:31 franck-ThinkPad-T430s dbus[3296]: [system] AppArmor D-Bus mediation is enabled
 Oct 24 10:38:16 franck-ThinkPad-T430s dbus[3387]: [system] AppArmor D-Bus mediation is enabled
 Oct 24 11:08:57 franck-ThinkPad-T430s dbus[3396]: [system] AppArmor D-Bus mediation is enabled
UpgradeStatus: Upgraded to yakkety on 2016-10-14 (9 days ago)