Revert "runc: bump to v1.0.0-rc4"

This reverts commit 3861ce09.

As reported on IRC, runc v1.0.0-rc4 is not compatible with the docker-engine
version we are using, so lets revert for 2017.11:

20:27 < eschu> It looks like 25 days ago buildroot had runc updated to
               1.0.0-rc4, which breaks compatibility with the docker-engine
               version 17.05.  Is there somewhere issues like this are
               reported?  Or is it just expected on non-release versions of
               buildroot?

20:47 < Jacmet> eschu: ahh, so the new runc doesn't work with the old
                docker-engine?  what kind of errors do you get exactly?

20:49 < eschu> Jacmet:  yes, runc made a change from -console to
               --console-socket, which results in "Incorrect Usage" error
               "flag provided but not defined: -console"

20:51 < eschu> Jacmet:  basically docker-engine 17.05 uses -console, but
               support for that was cut off in runc around the first 1.0.0
               versions.  I'll check the patches out, or might just
               downgrade to buildroot 2017.08 release

20:51 < agb> Jacmet: unfortunately this issue has hit a number of distributions
             https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877146



20:53 < Jacmet> agb: thanks.  I'll send a revert for 2017.11 and hopefully
                we can make progress on the other docker packages for
                2018.02

Cc: Christian Stewart <christian@paral.in>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>