Replaced breakme with lkdtm in punybench

crash in the puny benchmarks, now trys to
use lkdtm and if that fails, uses breakme.

BUG=chromium:215167
TEST=platform_SyncTest

Change-Id: Ib291db39a0acda01fbf05b09bcaf4ecbafb01223
Reviewed-on: https://gerrit.chromium.org/gerrit/63068
Reviewed-by: Kees Cook <[email protected]>
Tested-by: Paul Taysom <[email protected]>
Commit-Queue: Paul Taysom <[email protected]>
1 file changed