avutil/frame: Move new field to the end of AVFrame

This fixes part of Ticket5676
This fixes kodi, mpv, chromium and ffplay build against 3.0 and linked to 3.1

This is a similar ABI fix to 1eb43af1a0

Approved-by: BBB
Approved-by: jamrial
Approved-by: BtbN
Approved-by: nevcairiel
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavutil/frame.h

@@ -427,12 +427,6 @@ typedef struct AVFrame {
 
     enum AVChromaLocation chroma_location;
 
-    /**
-     * For hwaccel-format frames, this should be a reference to the
-     * AVHWFramesContext describing the frame.
-     */
-    AVBufferRef *hw_frames_ctx;
-
     /**
      * frame timestamp estimated using various heuristics, in stream time base
      * Code outside libavutil should access this field using:
@@ -524,6 +518,11 @@ typedef struct AVFrame {
      */
     AVBufferRef *qp_table_buf;
 #endif
+    /**
+     * For hwaccel-format frames, this should be a reference to the
+     * AVHWFramesContext describing the frame.
+     */
+    AVBufferRef *hw_frames_ctx;
 } AVFrame;
 
 /**