Redirect $TMPDIR when running containerd tests
Redirect $TMPDIR when running containerd tests

These tests expect a $TMPDIR which supports user xattrs, which the tmpfs on
/tmp does not. Redirect it to the persistent disk which does.

Signed-off-by: Ian Campbell <a8db091655a7f47ecb9c39a2d278e9662e440dc0@docker.com>

konstruktoid/linuxkit,rn/linuxkit,deitch/linuxkit,deitch/linuxkit,rn/linuxkit,djs55/linuxkit,deitch/linuxkit,furious-luke/linuxkit,rn/linuxkit,justincormack/linuxkit,yankcrime/linuxkit,rn/linuxkit,konstruktoid/linuxkit,djs55/linuxkit,JohnnyLeone/linuxkit,yankcrime/linuxkit,djs55/linuxkit,justincormack/linuxkit,deitch/linuxkit,deitch/linuxkit,linuxkit/linuxkit,djs55/linuxkit,JohnnyLeone/linuxkit,linuxkit/linuxkit,yankcrime/linuxkit,yankcrime/linuxkit,furious-luke/linuxkit,justincormack/linuxkit,furious-luke/linuxkit,JohnnyLeone/linuxkit,furious-luke/linuxkit,JohnnyLeone/linuxkit,linuxkit/linuxkit,konstruktoid/linuxkit,konstruktoid/linuxkit,linuxkit/linuxkit,konstruktoid/linuxkit,furious-luke/linuxkit,yankcrime/linuxkit,djs55/linuxkit,justincormack/linuxkit,justincormack/linuxkit,konstruktoid/linuxkit,linuxkit/linuxkit,yankcrime/linuxkit,rn/linuxkit,JohnnyLeone/linuxkit,justincormack/linuxkit