bancha: prepend an OpenTitan manifest to the EXT firmware image
This uses a fake test key. It is meant purely for demonstration.
Bypass-Presubmit-Reason: verified as part of topic
Change-Id: I1e14822216323660a8be3a2decf8b04adac8059d
This is the project containing all the top-level build targets of all the projects within the GoB to set up the environment and build the e2e artifacts.