Added aos-3.8 releaser for tito

.tito/releasers.conf

@@ -42,6 +42,10 @@ releaser = tito.release.DistGitReleaser
 branches = rhaos-3.7-rhel-7
 srpm_disttag = .el7aos
 
+[aos-3.8]
+releaser = tito.release.DistGitReleaser
+branches = rhaos-3.8-rhel-7
+srpm_disttag = .el7aos
 
 [copr-openshift-ansible]
 releaser = tito.release.CoprReleaser