[CoreMedia] Implement Xcode 16 RC changes. (#21226)

src/CoreMedia/CMEnums.cs

@@ -108,6 +108,7 @@ namespace CoreMedia {
 		Cinepak = 0x63766964,
 		JPEG = 0x6a706567,
 		JPEG_OpenDML = 0x646d6231,
+		JPEG_XL = ('j' << 24) + ('x' << 16) + ('l' << 8) + 'c', // 'jxlc'
 		SorensonVideo = 0x53565131,
 		SorensonVideo3 = 0x53565133,
 		H263 = 0x68323633,

tests/cecil-tests/Documentation.KnownFailures.txt

@@ -7643,6 +7643,7 @@ F:CoreMedia.CMVideoCodecType.H264
 F:CoreMedia.CMVideoCodecType.Hevc
 F:CoreMedia.CMVideoCodecType.JPEG
 F:CoreMedia.CMVideoCodecType.JPEG_OpenDML
+F:CoreMedia.CMVideoCodecType.JPEG_XL
 F:CoreMedia.CMVideoCodecType.Mpeg1Video
 F:CoreMedia.CMVideoCodecType.Mpeg2Video
 F:CoreMedia.CMVideoCodecType.Mpeg4Video