[WIP] Build libkiwix using `error_response_i18n`

See kiwix/libkwix#1032

appveyor/install_libkiwix.cmd

@@ -2,6 +2,7 @@ REM ========================================================
 REM Install libkiwix
 git clone https://github.com/kiwix/libkiwix.git || exit /b 1
 cd libkiwix
+git checkout error_response_i18n || exit /b 1
 set CPPFLAGS="-I%EXTRA_DIR%/include"
 meson . build --prefix %EXTRA_DIR% --default-library static --buildtype release || exit /b 1
 cd build

kiwixbuild/dependencies/libkiwix.py

@@ -14,6 +14,7 @@ class Libkiwix(Dependency):
     class Source(GitClone):
         git_remote = "https://github.com/kiwix/libkiwix.git"
         git_dir = "libkiwix"
+        git_ref = "error_response_i18n"
 
     class Builder(MesonBuilder):
         dependencies = ["pugixml", "libzim", "zlib", "lzma", "libcurl", "libmicrohttpd", "icu4c", "mustache", "xapian-core"]