Also report failed actions after a build
Also report failed actions after a build

From the build event protocol, we can immediately get information about
actions that failed. Report them after the build to allow easier debugging
of failures.

For the time being, we report the plain events; formatting, and reading
referenced files can be improved in a follow-up change, if needed.

Change-Id: Ia79cf5e171d6992376cc5dbb4ac875ef44ff0b3d

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration