Release build failed to validate because the result dynamic link library doesn't export native method symbols

[rayman-zhao]

Steps to reproduce on macOS 26 :

1. Git clone the main branch;
2. In the swift-java/Samples/JavaKitSampleApp folder, run "swift build";
3. The debug build works perfectly, ci-validate.sh passed;
4. Then create release build by running "swift build -c release";
5. Validate result based on the ci-validate.sh script;

Result:

java -cp .build/plugins/outputs/javakitsampleapp/JavaKitExample/destination/JavaCompilerPlugin/Java -Djava.library.path=.build/release "com.example.swift.JavaKitSampleMain"

Exception in thread "main" java.lang.UnsatisfiedLinkError: 'int com.example.swift.HelloSwift.sayHello(int, int)'
at com.example.swift.HelloSwift.sayHello(Native Method)
at com.example.swift.JavaKitSampleMain.main(JavaKitSampleMain.java:23)

The nm tool shows the release build missing exports native functions similar to debug build:

0000000000002a20 T _Java_com_example_swift_HelloSwift_sayHello
00000000000041d0 T _Java_com_example_swift_HelloSwift_throwMessageFromSwift