libimagequant: re-create broken importlib with dlltool

See #23358

mingw-w64-libimagequant/PKGBUILD

@@ -4,7 +4,7 @@ _realname=libimagequant
 pkgbase=mingw-w64-${_realname}
 pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}")
 pkgver=4.3.4
-pkgrel=1
+pkgrel=2
 pkgdesc="Palette quantization library (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -44,6 +44,12 @@ package() {
     --prefix=${MINGW_PREFIX} \
     --manifest-path imagequant-sys/Cargo.toml
 
+  # https://github.com/msys2/MINGW-packages/issues/23358
+  dlltool \
+    -D"${pkgdir}${MINGW_PREFIX}/bin/imagequant.dll" \
+    -d"${pkgdir}${MINGW_PREFIX}/lib/imagequant.def" \
+    -l"${pkgdir}${MINGW_PREFIX}/lib/libimagequant.dll.a"
+
   # Remove def file
   rm -f "${pkgdir}"${MINGW_PREFIX}/lib/*.def