build: The MPEG-4 video parser depends on h263dsp

The dependency is indirect through the h263/mpegvideo code.
CC: libav-stable@libav.org

configure

@@ -1845,7 +1845,7 @@ wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
 
 # parsers
 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
-mpeg4video_parser_select="error_resilience mpegvideo"
+mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
 mpegvideo_parser_select="error_resilience mpegvideo"
 vc1_parser_select="mpegvideo"