board: enable rauc upgrade history and event logging (json)

The rauc event logger is a separate glib logger that by default logs to
the system console, with annoying ANSI escape sequences.  This commit
drops the default stdout/stderr redirect of these log messages and adds
a more exhaustive bundle install and event log, in json format, instead.

For more information about event logging, see the rauc documentation:
https://rauc.readthedocs.io/en/latest/advanced.html

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

board/aarch64/rootfs/etc/rauc/system.conf

@@ -6,6 +6,12 @@ mountprefix=/var/lib/rauc/mnt
 bundle-formats=-plain
 max-bundle-download-size=1073741824
 
+[log.event-log]
+filename=/var/log/upgrade-json.log
+format=json-pretty
+max-size=1M
+max-files=5
+
 [keyring]
 directory=/etc/rauc/keys
 

board/common/rootfs/etc/finit.d/available/rauc.conf

@@ -1,5 +1,5 @@
 set G_MESSAGES_DEBUG=nocolor
 service [2345] <service/dbus/running> \
-	env:-/etc/default/rauc log:prio:user.notice \
+	env:-/etc/default/rauc  \
 	rauc service $RAUC_ARGS -- Software update service
 

board/riscv64/rootfs/etc/rauc/system.conf

@@ -6,6 +6,12 @@ mountprefix=/var/lib/rauc/mnt
 bundle-formats=-plain
 max-bundle-download-size=1073741824
 
+[log.event-log]
+filename=/var/log/upgrade-json.log
+format=json-pretty
+max-size=1M
+max-files=5
+
 [keyring]
 directory=/etc/rauc/keys
 

board/x86_64/rootfs/etc/rauc/system.conf

@@ -7,6 +7,12 @@ mountprefix=/var/lib/rauc/mnt
 bundle-formats=-plain
 max-bundle-download-size=1073741824
 
+[log.event-log]
+filename=/var/log/upgrade-json.log
+format=json-pretty
+max-size=1M
+max-files=5
+
 [keyring]
 directory=/etc/rauc/keys