Add JExtract JNI sample app #665

Job	Run time
Java tests (swift:6.1.2 jdk:Corretto os:jammy)	11m 8s
Swift tests (swift:6.1.2 jdk:Corretto os:jammy)	4m 38s
Verify Sample JavaDependencySampleApp (swift:6.1.2 jdk:Corretto os:jammy)	5m 41s
Verify Sample JavaKitSampleApp (swift:6.1.2 jdk:Corretto os:jammy)	3m 47s
Verify Sample JExtractJNISampleApp (swift:6.1.2 jdk:Corretto os:jammy)	4m 7s
Verify Sample JavaProbablyPrime (swift:6.1.2 jdk:Corretto os:jammy)	3m 28s
Verify Sample SwiftKitSampleApp (swift:6.1.2 jdk:Corretto os:jammy)	4m 25s
Verify Sample JavaSieve (swift:6.1.2 jdk:Corretto os:jammy)	1m 6s
Verify Sample SwiftAndJavaJarSampleLib (swift:6.1.2 jdk:Corretto os:jammy)	4m 7s
soundness / Unacceptable language check	6s
soundness / License headers check	8s
soundness / Broken symlinks check	6s
soundness / Shell check	38s
soundness / Documentation check	45s
soundness / Python lint check	8s
soundness / YAML lint check	6s
soundness / Format check	0s
soundness / API breakage check	0s
	44m 24s

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