added .git to excluded files for dirty builds
added .git to excluded files for dirty builds

jboss-container-images/concreate,jboss-container-images/concreate,jboss-dockerfiles/dogen,goldmann/dogen,jboss-dockerfiles/dogen,jboss-container-images/concreate,goldmann/dogen,goldmann/dogen,jboss-dockerfiles/dogen