checksum-oostubs: traces aren't single protobuf messages

... therefore we shouldn't use the .pb file extension here.  Simply rename
your existing .pb to .tc for reuse.

+defining LOCAL for experiment debugging (disabled)

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1415 8c4709b5-6ec9-48aa-a5cd-a96041d1645a