common: introduce red_printf_debug
common: introduce red_printf_debug

elmarco/spice-common,fgouget/spice-common,SPICE/spice-common,elmarco/spice-common,fgouget/spice-common,freedesktop-unofficial-mirror/spice__spice-common,elmarco/spice-common,Fantu/spice-common,Fantu/spice-common,freedesktop-unofficial-mirror/spice__spice-common,fgouget/spice-common,fgouget/spice-common,Fantu/spice-common,elmarco/spice-common,Fantu/spice-common,freedesktop-unofficial-mirror/spice__spice-common,SPICE/spice-common,freedesktop-unofficial-mirror/spice__spice-common,SPICE/spice-common