busybox: make it possible to have permanent logfiles

* bump the PRINC

[holger: Depending on some global settings /var/log will be a
symlink to "volatile". But when we log to a file we want it to
be persistent. So make sure /var/log is not pointing to volatile
but a real directory]

recipes-core/busybox/busybox-systemd/busybox-syslog.default

@@ -1,2 +1,12 @@
 # source the sysvinit configuration file
 . /etc/syslog-startup.conf
+
+# check if we want permanent log files and prepare /var/log
+if [ "${DESTINATION}" = "buffer" -a ! -h /var/log ]; then
+    rm -rf /var/log
+    cd /var
+    ln -s volatile/log log
+elif [ "${DESTINATION}" = "file" -a -h "/var/log" ]; then
+    rm -rf /var/log
+    mkdir /var/log
+fi

recipes-core/busybox/busybox_sysmocom.inc

@@ -1,6 +1,6 @@
 SYSMOCOM := "${@os.path.dirname(bb.data.getVar('FILE', d, True))}"
 FILESEXTRAPATHS_prepend := "${SYSMOCOM}/busybox-${SYSMOCOM_ORIG_PV}:${SYSMOCOM}/files:"
-PRINC = "22"
+PRINC = "23"
 
 SRC_URI += "file://busybox-ifplugd.sh \
             file://ifplugd.sh"