Use --static-swift-stdlib to use Foundation

Author: kateinoigakukun

.github/workflows/compatibility.yml

@@ -18,5 +18,5 @@ jobs:
           set -eux
           make bootstrap
           cd Examples/Basic
-          swift build --triple wasm32-unknown-wasi
-          swift build --triple wasm32-unknown-wasi -Xswiftc -DJAVASCRIPTKIT_WITHOUT_WEAKREFS
+          swift build --triple wasm32-unknown-wasi --static-swift-stdlib
+          swift build --triple wasm32-unknown-wasi -Xswiftc -DJAVASCRIPTKIT_WITHOUT_WEAKREFS --static-swift-stdlib