Upgrade to Linux 3.16.5-1

Originally created by @intrigeri on #8100 (Redmine)

It has been uploaded to sid two days ago. We’ll want to:

check if it has changes we do want (security or regression fixes); given the huge list of changes, and the reported regressions in 1.2~rc1 (MAC spoofing, nouveau DRM), I very much suspect so: http://metadata.ftp-master.debian.org/changelogs/main/l/linux/unstable_changelog
if yes:
- adjust our code according to the ABI bump
- make sure it’s in the i386 archive you use, when we build the final 1.2 ISO

Feature Branch: feature/8100-linux-3.16.5-1

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