try debugging JNI on CI

Author: ktoso

Samples/JavaKitSampleApp/ci-validate.sh

@@ -5,6 +5,7 @@ set -x
 
 swift build
 "$JAVA_HOME/bin/java" \
+    -verbose:jni \
     -cp .build/plugins/outputs/javakitsampleapp/JavaKitExample/destination/JavaCompilerPlugin/Java \
     -Djava.library.path=.build/debug \
     "com.example.swift.JavaKitSampleMain"