Create mount point /Applications

We need to have the target mount point /Applications available for
Applications.mount unit to work because the rootfs is mounted read-only

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.co.uk>
Reviewed-by: Frédéric Dalleau <frederic.dalleau@collabora.com>
Reviewed-by: Denis Pynkin <denis.pynkin@collabora.com>
Differential Revision: https://phabricator.apertis.org/D7854