Fix warnings on 64 bits

Fix warnings on 64 bits

Use the glib-provided macros to print 64 bit values.

lightmediascannerd.c:212:9: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 4 has type ‘gint64’ [-Wformat=]
         g_warning("Couldn't bind delete old dtime '%lld'from %s: %s",

lightmediascannerctl.c:280:16: warning: format ‘%llu’ expects argument
of type ‘long long unsigned int’, but argument 4 has type ‘guint64’
[-Wformat=]
                category, path, uptodate, processed, deleted, skipped,
		errors);