Fixed the test build for chakracore

Fixes #774

test-build.sh

@@ -63,6 +63,11 @@ for version in "${versions[@]}"; do
   tag=$(get_tag "${version}")
   full_version=$(get_full_version "${version}")
 
+  # Required for chakracore
+  if [ -f "${version}/Dockerfile" ]; then
+    build "${version}" "default" "${tag}"
+  fi
+
   # Get supported variants according to the target architecture.
   # See details in function.sh
   IFS=' ' read -ra variants <<<"$(get_variants "$(dirname "${version}")" "${variant_arg[@]}")"