[Toybox] [PATCH] dmesg: fix multi-line messages

[Ju Hyung Park]

A single printk() can contain multiple lines via multiple '\n's,
and toybox just spits it out to a single line with '\x0a' as the delimiter.

Fix it.

Test:
sh -c "printf 'line a\nline b'" > /dev/kmsg

Before patch:
[ 5346.513120] line a\x0aline b

After patch:
[ 5346.513120] line a
               line b

This patch is tested with -r, -T and -t.

Signed-off-by: Park Ju Hyung <qkrwngud825 at gmail.com>
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