rpm: allow BR: systemd-mini on openSUSE too

QubesOS/qubes-issues#6567

Author: marmarek

rpm_spec/gui-agent.spec.in

@@ -160,7 +160,7 @@ Summary: Remote GuiVM support using VNC
 Requires: x11vnc
 %if 0%{?is_opensuse}
 # for directory ownership
-BuildRequires: systemd
+BuildRequires: (systemd or systemd-mini)
 %endif
 
 %description -n qubes-gui-vnc