avformat/movenc: Make some AVCodecTag tables static

They are not used anywhere else.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/movenc.c

@@ -7114,7 +7114,7 @@ static const AVCodecTag codec_3gp_tags[] = {
     { AV_CODEC_ID_NONE, 0 },
 };
 
-const AVCodecTag codec_mp4_tags[] = {
+static const AVCodecTag codec_mp4_tags[] = {
     { AV_CODEC_ID_MPEG4,           MKTAG('m', 'p', '4', 'v') },
     { AV_CODEC_ID_H264,            MKTAG('a', 'v', 'c', '1') },
     { AV_CODEC_ID_H264,            MKTAG('a', 'v', 'c', '3') },
@@ -7150,7 +7150,7 @@ const AVCodecTag codec_mp4_tags[] = {
     { AV_CODEC_ID_NONE,               0 },
 };
 
-const AVCodecTag codec_ism_tags[] = {
+static const AVCodecTag codec_ism_tags[] = {
     { AV_CODEC_ID_WMAPRO      , MKTAG('w', 'm', 'a', ' ') },
     { AV_CODEC_ID_NONE        ,    0 },
 };