kernel_log_collector.sh : correct kernel message pattern

The timestamp in the kernel message can have either "+" or "-"
sign. We want to match both of them.

BUG=chromium:226186
TEST=Make sure the script can capture message starting with
"2013-06-19T20:38:58.663410+00:00 localhost kernel: ["

Change-Id: I93647d4fc8b3d796166d2e959b24364de4bc60c5
Reviewed-on: https://gerrit.chromium.org/gerrit/59297
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Yufeng Shen <miletus@chromium.org>
Tested-by: Yufeng Shen <miletus@chromium.org>
1 file changed
tree: 2a622ac065dafd1c41bfb5fc2fc3a0d5102f4e32
  1. crash_reporter/