avfilter: add areverse filter

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavfilter/allfilters.c

@@ -59,6 +59,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(APERMS,         aperms,         af);
     REGISTER_FILTER(APHASER,        aphaser,        af);
     REGISTER_FILTER(ARESAMPLE,      aresample,      af);
+    REGISTER_FILTER(AREVERSE,       areverse,       af);
     REGISTER_FILTER(ASELECT,        aselect,        af);
     REGISTER_FILTER(ASENDCMD,       asendcmd,       af);
     REGISTER_FILTER(ASETNSAMPLES,   asetnsamples,   af);