update to libavif 0.8.1, from Brad.

graphics/libavif/Makefile

@@ -1,14 +1,13 @@
-# $OpenBSD: Makefile,v 1.9 2020/05/17 09:29:01 ajacoutot Exp $
+# $OpenBSD: Makefile,v 1.10 2020/10/03 13:18:39 sthen Exp $
 
 COMMENT=	library for encoding and decoding .avif files
 
 GH_ACCOUNT=	AOMediaCodec
 GH_PROJECT=	libavif
-GH_TAGNAME=	v0.7.3
-REVISION=	0
+GH_TAGNAME=	v0.8.1
 CATEGORIES=	graphics
 
-SHARED_LIBS=	avif	1.1
+SHARED_LIBS=	avif	2.0
 
 HOMEPAGE=	https://github.com/AOMediaCodec/libavif
 

graphics/libavif/distinfo

@@ -1,2 +1,2 @@
-SHA256 (libavif-0.7.3.tar.gz) = pM4DZJxY7J89xqsrfPfVhHSxSazx5MVjvkCButYO0t0=
-SIZE (libavif-0.7.3.tar.gz) = 2893675
+SHA256 (libavif-0.8.1.tar.gz) = J9ObaRUf0JDybhB3nseYdq9Eh20YDt2ne+r6jn56yiY=
+SIZE (libavif-0.8.1.tar.gz) = 2915941

graphics/libavif/patches/patch-src_codec_aom_c

@@ -1,17 +0,0 @@
-$OpenBSD: patch-src_codec_aom_c,v 1.3 2020/05/17 09:29:09 ajacoutot Exp $
-
-Re-enable cpu-used=7+ in codec_aom when libaom major version > 1.
-
-Index: src/codec_aom.c
---- src/codec_aom.c.orig
-+++ src/codec_aom.c
-@@ -254,7 +254,8 @@ static avifBool aomCodecEncodeImage(avifCodec * codec,
-         }
-     }
- 
--    if (image->depth > 8) {
-+    int aomMajorVersion = aom_codec_version_major();
-+    if ((aomMajorVersion < 2) && (image->depth > 8)) {
-         // Due to a known issue with libavif v1.0.0-errata1-avif, 10bpc and
-         // 12bpc image encodes will call the wrong variant of
-         // aom_subtract_block when cpu-used is 7 or 8, and crash. Until we get