Provide a static version.h for development builds.

I forgot to add this in last week's versioning revamp, so that bob
builds work (constructing a version.h from the build script) but dev
builds straight from source control fail for lack of version.h.


git-svn-id: svn://svn.tartarus.org/sgt@10277 cda61777-01e9-0310-a592-d414129be87e