Fix mount of tracefs

A recent kernel update disabled debugfs. This means we can no longer
rely on the mount of debugfs to implicitly mount tracefs under
/sys/kernel/tracing. Do it explicitly.

Bug: 150447503
Bug: 147493341
Test: ls /sys/kernel/tracing | wc -l
Test: 34
Signed-off-by: Roman Kiryanov <rkir@google.com>
Change-Id: I3ed226d6bfc8b393acfc0e9c84726d5e2dd86db0
2 files changed