Major Description
Building from source from the RC1 tarball (https://dist.apache.org/repos/dist/dev/incubator/trafficcontrol/1.8.0/RC1/incubator-trafficcontrol-1.8.0-4549.bebf63ee.tar.gz) results in errors because of missing build number information (the 4549.bebf63ee portion). This is because it generates that using git, and the .git directory is not included in the tarball.
The `build.sh` script should generate and use a file with that info and create the tarball automatically with that file included.
