ci: Adapt to dnf5's builddep incompatibility

xref rpm-software-management/dnf5#799

ci/installdeps.sh

@@ -11,7 +11,7 @@ if [ -z "${SKIP_INSTALLDEPS:-}" ] && test $(id -u) -eq 0; then
     dnf -y install dnf-plugins-core
     # we have the canonical spec file handy so just builddep from that
     # XXX: use --allowerasing as a temporary hack to ease the migration to libmodulemd2
-    time dnf builddep --spec -y packaging/rpm-ostree.spec --allowerasing
+    pkg_builddep_spec --allowerasing packaging/rpm-ostree.spec 
 
     osid="$(. /etc/os-release && echo $ID)"
     if [ "${osid}" == centos ]; then

ci/libbuild.sh

@@ -29,6 +29,14 @@ pkg_install() {
     echo "Done running dnf -y install! $(date)"
 }
 
+pkg_builddep_spec() {
+    if test -x /usr/bin/dnf5; then
+        dnf builddep -y "$@"
+    else
+        dnf builddep -y --spec "$@"
+    fi
+}
+
 pkg_builddep() {
     # This is sadly the only case where it's a different command
     if test -x /usr/bin/dnf; then