Fix accidental removal of /etc/mtab from images
Fix accidental removal of /etc/mtab from images

This was breaking some containers that use it, was a mistake.

Signed-off-by: Justin Cormack <af64ee19f04db9509cb02b0e470e11e5402ef9b3@docker.com>

yankcrime/linuxkit,rn/linuxkit,furious-luke/linuxkit,deitch/linuxkit,davefreitag/tool,deitch/linuxkit,YuPengZTE/linuxkit,deitch/linuxkit,konstruktoid/linuxkit,furious-luke/linuxkit,konstruktoid/linuxkit,JohnnyLeone/linuxkit,JohnnyLeone/linuxkit,justincormack/linuxkit,riyazdf/tool,linuxkit/linuxkit,furious-luke/linuxkit,yankcrime/linuxkit,rn/linuxkit,YuPengZTE/linuxkit,deitch/linuxkit,furious-luke/linuxkit,justincormack/linuxkit,YuPengZTE/linuxkit,konstruktoid/linuxkit,yankcrime/linuxkit,djs55/linuxkit,djs55/linuxkit,yankcrime/linuxkit,rn/linuxkit,justincormack/tool,konstruktoid/linuxkit,konstruktoid/linuxkit,furious-luke/linuxkit,deitch/linuxkit,linuxkit/linuxkit,linuxkit/linuxkit,yankcrime/linuxkit,justincormack/linuxkit,linuxkit/linuxkit,linuxkit/linuxkit,justincormack/linuxkit,YuPengZTE/linuxkit,djs55/linuxkit,JohnnyLeone/linuxkit,konstruktoid/linuxkit,justincormack/linuxkit,justincormack/linuxkit,JohnnyLeone/linuxkit,djs55/linuxkit,YuPengZTE/linuxkit,rn/linuxkit,JohnnyLeone/linuxkit,YuPengZTE/linuxkit,djs55/linuxkit,rn/linuxkit,yankcrime/linuxkit