custom change directory and tmp cannot use same time

[ahmetozer]

If provisioned environment requires temporary test, tmp environment cannot be provisioned with existing setup.

sandal run --chd=/my/path --tmp=100 

Root cause

Behavior of tmp is create TMPFS to default path /var/lib/sandal/container/mycontainer/changes/workdir and if the user use --tmp command, it does not has impact at container environment.

Warning do not mount TMPFS to /var/lib/sandal/container/mycontainer/changes/workdir, instead replace chdir to one of lower layer and replace chdir with tmp destionation, with this changes can keep at environment and and temp can provisioned.