Otherwise the bots don't notice.

BUG=473924

Change-Id: Idb8cc4c255723ebbe2d52478040a70648910bf37
Reviewed-on: https://boringssl-review.googlesource.com/4232
Reviewed-by: Adam Langley <agl@google.com>

If the key is missing, it seems the failure is assumed to be expected.

BUG=473924

Change-Id: I62edd9110fa74bee5e6425fd6786badf5398728c
Reviewed-on: https://boringssl-review.googlesource.com/4231
Reviewed-by: Adam Langley <agl@google.com>

Also adds a flag to runner.go to make it more suitable for printing to a pipe.

Change-Id: I26fae21f3e4910028f6b8bfc4821c8c595525504
Reviewed-on: https://boringssl-review.googlesource.com/3490
Reviewed-by: Adam Langley <agl@google.com>