ci: tweak lint compilation flags (#591)

- ci: drop unused define when linting
- ci: align linting compiling flags with koreader
Enable all image formats, except for lunasvg (which needs a custom patched version).

.github/workflows/build.yml

@@ -40,8 +40,10 @@ jobs:
           libfribidi-dev
           libharfbuzz-dev
           libjpeg-turbo8-dev
+          libpng-dev
           libunibreak-dev
           libutf8proc-dev
+          libwebp-dev
           libxml2-utils
           libzstd-dev
         )

utils/lint.mk

@@ -192,12 +192,15 @@ define CPPFLAGS+=
 -DBUILD_LITE=0
 -DCR3_PATCH=1
 -DCR_EMULATE_GETTEXT
--DCR_RENDER_32BPP_RGB_PXFMT
 -DUSE_FONTCONFIG=0
 -DUSE_FREETYPE=1
 -DUSE_FRIBIDI=1
+-DUSE_GIF=1
 -DUSE_HARFBUZZ=1
+-DUSE_LIBJPEG=1
+-DUSE_LIBPNG=1
 -DUSE_LIBUNIBREAK=1
+-DUSE_LIBWEBP=1
 -DUSE_NANOSVG=0
 -DUSE_UTF8PROC=1
 -DUSE_ZSTD=1