Origin for each line in dmesg.init.mk from check-in 7a1e7f4a58:

7a1e7f4a58 2019-10-21        arcade: DMESG_FILE?=/var/run/dmesg.boot
7a1e7f4a58 2019-10-21        arcade: 
7a1e7f4a58 2019-10-21        arcade: dmesg: mountlate
7a1e7f4a58 2019-10-21        arcade: 	echo "MRC:$@> Writing dmesg."
7a1e7f4a58 2019-10-21        arcade: 	umask 022 ; dmesg -a >> ${DMESG_FILE}