can lm-profiler use kmsg instead of dmesg

[Ritesh Raj Sarraf]

lm-profiler currently does this:

process_dmesg_diff(){
        LEFT="$WORKDIR/dmesg_prev"
        RIGHT="$WORKDIR/dmesg_next"
        dmesg > $RIGHT
^^^^^^^^^^^^^^^^^^^^^^
        if [ -s $LEFT ] && [ -s $RIGHT ]; then
                # The following command is long and complicated. It does
                # the following things, separately for READ and WRITE
                # accesses:
                # 1. Retrieve only new lines, using diff.
                # 2. Drop the first line -- it is probably a truncated
                # version of an earlier line.