Add epel to cern8 and cern8s

This is me asking for permission. Will only run it once merged.

bin/tags/cern8.sh

@@ -3,6 +3,7 @@
 TAG="cern8"
 ARCHES="x86_64 aarch64"
 PERMS="admin"
+EPEL=1
 TESTING=1
 DISTTAG="el8.cern"
 
@@ -23,6 +24,10 @@ if [[ $DISTTAG != "" ]]; then
   $KOJI add-group-pkg $TAG-build srpm-build buildsys-macros-$DISTTAG
 fi
 
+if [[ $EPEL -eq 1 ]]; then
+  $KOJI add-tag-inheritance --priority 10 ${TAG}-build epel8
+fi
+
 if [[ $TESTING -eq 1 ]]; then
   $KOJI add-external-repo -t $TAG-build c8-testing-baseos -p 25 --mode=bare
   $KOJI add-external-repo -t $TAG-build c8-testing-appstream -p 35 --mode=bare