Don't use a separate tmpfs mount for /tmp and /run

We don't need a separate tmpfs on /tmp and /run, as we're already
providing a completely in-ram filesystem.

This requires us to override fstab, and device table - these are just
the buildroot standard ones, but with /tmp and /run removed.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
7 files changed