Update kernel and configs to v3.15-rc3.

This also enables POSIX ACL and extended attributes for tmpfs now.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
bfqsched: Update to v7r3.

This also rebases the patch against latest 3.15-rc3.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>