api: Cleanup protobufs formatting
api: Cleanup protobufs formatting

The proto file in the api/pb package had inconsistent formatting
before this patch.

LuiseV/quilt,LuiseV/quilt,ejj/quilt-dev,ejj/quilt-dev,kelda/kelda,kklin/kelda,LuiseV/quilt,ejj/quilt-dev,NetSys/quilt,kelda/kelda,quilt/quilt,kklin/quilt,kklin/quilt,quilt/quilt,kklin/kelda,quilt/quilt,kayousterhout/quilt,LuiseV/quilt,NetSys/quilt,kklin/quilt,kelda/kelda,quilt/quilt,LuiseV/quilt,kklin/kelda,ejj/quilt-dev,NetSys/quilt,kayousterhout/quilt,kelda/kelda,kklin/kelda,kayousterhout/quilt,NetSys/quilt,NetSys/quilt,kklin/quilt,kayousterhout/quilt