bootperf: Support autotest-generated bootperf result.

This adds backward compatibility to showbootdata for reading bootperf
keyval results generated using autotest.

BUG=b:183557938
TEST=showbootdata with autotest-generated results.

Change-Id: I207a5faf4684007975f6192612cd0269c57233b6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/2784340
Tested-by: Chinglin Yu <chinglinyu@chromium.org>
Commit-Queue: Chinglin Yu <chinglinyu@chromium.org>
Reviewed-by: Kuang-che Wu <kcwu@chromium.org>
1 file changed