webp-lossless-bitstream-spec,cosmetics: fix some typos
webp-lossless-bitstream-spec,cosmetics: fix some typos

Bug: webp:551
Change-Id: I9ff90601b77deb9034ed7bef9cfd421d1f6e2e2b

webmproject/libwebp,webmproject/libwebp,webmproject/libwebp,webmproject/libwebp,webmproject/libwebp