debugging sandbox on CI

Author: ktoso

Samples/SwiftJavaExtractJNISampleApp/ci-validate.sh

@@ -3,7 +3,7 @@
 set -x
 set -e
 
-swift build --disable-experimental-prebuilts --disable-sandbox  # FIXME: until prebuilt swift-syntax isn't broken on 6.2 anymore: https://github.com/swiftlang/swift-java/issues/418
+swift build --disable-experimental-prebuilts --disable-sandbox --verbose  # FIXME: until prebuilt swift-syntax isn't broken on 6.2 anymore: https://github.com/swiftlang/swift-java/issues/418
 
 ./gradlew run
-./gradlew test
+./gradlew test