gimp3: disable lua for clangarm64

the build fails if luajit is missing

mingw-w64-gimp3/PKGBUILD

@@ -95,6 +95,11 @@ build() {
   [[ -d "${srcdir}"/build-${MSYSTEM} ]] && rm -rf "${srcdir}"/build-${MSYSTEM}
   mkdir -p "${srcdir}"/build-${MSYSTEM} && cd "${srcdir}"/build-${MSYSTEM}
 
+  declare -a extra_config
+  if [[ $MSYSTEM_CARCH == aarch64 ]]; then
+    extra_config+=("-Dlua=disabled")
+  fi
+
   CFLAGS+=" -Wno-error=int-conversion -Wno-incompatible-function-pointer-types" \
   CXXFLAGS+=" -Wno-error=int-conversion -Wno-incompatible-function-pointer-types" \
   MSYS2_ARG_CONV_EXCL="--prefix=" \
@@ -115,6 +120,7 @@ build() {
     -Dlinux-input=disabled \
     -Dxcursor=disabled \
     -Dwin32-debug-console=true \
+    "${extra_config[@]}" \
     ../gimp-${pkgver}
 
   ${MINGW_PREFIX}/bin/meson.exe compile