avformat/matroska: fix MatroskaVideoFieldOrder enum values

The spec says

9: Interlaced with bottom field displayed first and top field stored first
14: Interlaced with top field displayed first and bottom field stored first

And avcodec.h states

AV_FIELD_TB,          //< Top coded first, bottom displayed first
AV_FIELD_BT,          //< Bottom coded first, top displayed first

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

libavformat/matroska.h

@@ -233,8 +233,8 @@ typedef enum {
     MATROSKA_VIDEO_FIELDORDER_UNDETERMINED = 2,
     MATROSKA_VIDEO_FIELDORDER_TT           = 1,
     MATROSKA_VIDEO_FIELDORDER_BB           = 6,
-    MATROSKA_VIDEO_FIELDORDER_BT           = 9,
-    MATROSKA_VIDEO_FIELDORDER_TB           = 14,
+    MATROSKA_VIDEO_FIELDORDER_TB           = 9,
+    MATROSKA_VIDEO_FIELDORDER_BT           = 14,
 } MatroskaVideoFieldOrder;
 
 typedef enum {

libavformat/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 57
-#define LIBAVFORMAT_VERSION_MINOR  8
+#define LIBAVFORMAT_VERSION_MINOR  9
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \