add platform2 support

BUG=chromium:337753
TEST=`FEATURES=test emerge-x86-alex platform2` builds & runs crash tests
TEST=`cbuildbot chromiumos-sdk` passes

Change-Id: Ia1f98b6058ff615ffc862955934096531c5d237d
Reviewed-on: https://chromium-review.googlesource.com/183661
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed
tree: 0b6de22ff14e3408a1ca8077bf7b18a13cdfcb4e
  1. crash_reporter/