While running sbuild-createchroot, debootstrap would umount
the instance's /proc when the instance is called with
"--privileged" option.
This is reported in Debian's bug tracker as:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=968927
To workaround this, we download the debootstrap from Debian
Experimental which contains this fix and install it via dpkg
when the container is built.
Tested locally by building the container and creating an sbuild
environment.
Story: 2008846
Task: 43625
Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: I6133dc402995b285614b8520d81ae1c2108f295c
e7e8a21e81