avcodec/Makefile: include aom_film_grain.o file for h264_sei component

h264_sei depends on h2645_sei, which in turn depends on aom_film_grain for
ff_aom_uninit_film_grain_params()

libavcodec/Makefile

@@ -110,7 +110,7 @@ OBJS-$(CONFIG_H264PARSE)               += h264_parse.o h264_ps.o h264data.o \
                                           h2645data.o h2645_parse.o h2645_vui.o
 OBJS-$(CONFIG_H264PRED)                += h264pred.o
 OBJS-$(CONFIG_H264QPEL)                += h264qpel.o
-OBJS-$(CONFIG_H264_SEI)                += h264_sei.o h2645_sei.o
+OBJS-$(CONFIG_H264_SEI)                += h264_sei.o h2645_sei.o aom_film_grain.o
 OBJS-$(CONFIG_HEVCPARSE)               += h2645data.o h2645_parse.o h2645_vui.o
 OBJS-$(CONFIG_HEVC_SEI)                += h2645_sei.o aom_film_grain.o \
                                           dynamic_hdr_vivid.o