Move Foundation module files to correct path

Author: MaxDesiatov

utils/webassembly/build-foundation.sh

@@ -30,4 +30,8 @@ ninja -v install
 if [[ "$(uname)" == "Darwin" ]]; then
   mv $DESTINATION_TOOLCHAIN/usr/lib/swift_static/CoreFoundation \
     $DESTINATION_TOOLCHAIN/usr/lib/swift/wasi/wasm32/CoreFoundation
-fi
+fi
+
+# .swiftdoc and .swiftmodule files should live in `swift`, not in `swift_static`
+mv $DESTINATION_TOOLCHAIN/usr/lib/swift_static/wasi/wasm32/Foundation.swift* \
+  $DESTINATION_TOOLCHAIN/usr/lib/swift/wasi/wasm32