_sandboxbwrap.py: Create /dev/shm in the sandbox
Description
Adds a tmpfs at /dev/shm in bwrap sandboxes. I'm unsure if this is a problem for other sandbox backends, but if so I'm willing to mirror these changes to those too. Also, it might be nice to get this backported to 1.4 if that seems sensible.
Changes proposed in this merge request:
- Create a tmpfs at /dev/shm in the bwrap sandbox
This merge request, when approved, will close: #1197 (closed)