initscripts: fix creation order for /var/log with VOLATILE_LOG_DIR=true

Create the /var/log symlink directly after /var/volatile/log, so
/var/log is available for the creation of /var/log/wtmp a few lines
later.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>