update libwebp to v1.2.1
https://chromium.googlesource.com/webm/libwebp/+log/v1.2.0..v1.2.1
- 7/20/2021: version 1.2.1
This is a binary compatible release.
* minor lossless encoder improvements and x86 color conversion speed up
* add ARM64 simulator support to xcframeworkbuild.sh (#510)
* further security related hardening in libwebp & examples
(issues: #497, #508, #518)
(chromium: #1196480, #1196773, #1196775, #1196777, #1196778, #1196850)
(oss-fuzz: #28658, #28978)
* toolchain updates and bug fixes (#498, #501, #502, #504, #505, #506, #509,
#533)
* use more inclusive language within the source (#507)
Bug: b/188435220
Change-Id: I7e01c96d3598c8738fb11d541b9a078b6f29fbc0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/434197
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
7d095952c2