Roll src/third_party/libavif/src/ 94ac5b4c7..f88383daa (11 commits)

https://chromium.googlesource.com/external/github.com/AOMediaCodec/libavif.git/+log/94ac5b4c7215..f88383daa8de

$ git log 94ac5b4c7..f88383daa --date=short --no-merges --format='%ad %ae %s'
2020-08-31 wtc Make AVIF_ENABLE_WERROR enable -Werror or /WX only
2020-08-28 wtc Generalize the sanity check for the sum of extents
2020-08-21 kornel Option to build with compilers that have more warnings
2020-08-28 wtc Miscellaneous minor cleanups
2020-08-28 wtc Validate adds, casts in avifParseItemLocationBox
2020-08-18 dnovomesky Transformations support (crop,rotate,mirror) in gdk-pixbuf loader
2020-08-29 nathbappai gdk-pixbuf/loader.c: Include stdlib.h for strtol
2020-08-28 jdrago Fixes for oss-fuzz 25266
2020-08-28 jdrago Support multiple extents in an ItemLocationBox
2020-08-27 jdrago Codec-specific options plumbing for advanced encoding settings (unused, first pass)
2020-08-22 wtc Disable -Wpoison-system-directories if supported

Created with:
  roll-dep src/third_party/libavif/src
R=dalecurtis@chromium.org

Bug: 1122634
Change-Id: I28fbb6810da03aace61d932709119c1b03650915
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2386673
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803537}

DEPS

@@ -342,7 +342,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libavif
   # and whatever else without interference from each other.
-  'libavif_revision': '94ac5b4c721597f739ee4b6fadee5c56bf952c73',
+  'libavif_revision': 'f88383daa8de92d57e898cce9c2d23a9fe87802c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling nearby
   # and whatever else without interference from each other.