[BUG][cryo] Create file on restart ?

[sukadev at us.ibm.com]

| 	If all the applications in a container are frozen then I think we can
| get fs snapshots consistent with checkpointed applications.

I agree in general, but cryo currently takes a checkpoint and the
application resumes, which means the application could create the
temp file.  So, cryo should not resume the application until the
FS snapshot is taken too I guess.

| Otherwise, yes, I think we'd be gambling that the checkpointed
| application isn't interacting with another, running, application via an
| intermittently-shared file.

Yes.