Squashed 'external/libwebp/libwebp/' content from commit dd7364c3c

git-subtree-dir: external/libwebp/libwebp
git-subtree-split: dd7364c3cefe0f5c0b3c18c3b1887d353f90fc1f

.gitignore

@@ -0,0 +1,56 @@
+*.l[ao]
+*.[ao]
+*.pc
+.DS_Store
+.deps
+.idea
+.libs
+.vscode
+/aclocal.m4
+/ar-lib
+/autom4te.cache
+/compile
+/config.*
+/configure
+/depcomp
+/dist
+/install-sh
+/libtool
+/ltmain.sh
+/missing
+/mkinstalldirs
+/stamp-h1
+Makefile
+Makefile.in
+examples/anim_diff
+examples/anim_dump
+examples/[cdv]webp
+examples/gif2webp
+examples/img2webp
+examples/webpinfo
+examples/webpmux
+src/webp/config.h*
+src/webp/stamp-h1
+/output
+/doc/output
+*.idb
+*.pdb
+/iosbuild
+/xcframeworkbuild
+/WebP*.*framework
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+.gradle
+/build
+extras/get_disto
+extras/vwebp_sdl
+extras/webp_quality
+tests/fuzzer/advanced_api_fuzzer
+tests/fuzzer/animation_api_fuzzer
+tests/fuzzer/animdecoder_fuzzer
+tests/fuzzer/animencoder_fuzzer
+tests/fuzzer/demux_api_fuzzer
+tests/fuzzer/enc_dec_fuzzer
+tests/fuzzer/mux_demux_api_fuzzer
+tests/fuzzer/simple_api_fuzzer