Register JNA's native library integration in LinuxSocketDomain

See gh-19836

spring-boot-project/spring-boot-tools/spring-boot-cloudnativebuildpack/src/main/java/org/springframework/boot/cloudnativebuildpack/socket/LinuxDomainSocket.java

@@ -22,6 +22,8 @@ import java.util.Arrays;
 import java.util.List;
 
 import com.sun.jna.LastErrorException;
+import com.sun.jna.Native;
+import com.sun.jna.Platform;
 import com.sun.jna.Structure;
 
 import org.springframework.util.Assert;
@@ -33,6 +35,10 @@ import org.springframework.util.Assert;
  */
 class LinuxDomainSocket extends DomainSocket {
 
+	static {
+		Native.register(Platform.C_LIBRARY_NAME);
+	}
+
 	LinuxDomainSocket(String path) throws IOException {
 		super(path);
 	}

spring-boot-project/spring-boot-tools/spring-boot-cloudnativebuildpack/src/test/java/org/springframework/boot/cloudnativebuildpack/docker/DockerApiIntegrationTests.java

@@ -19,8 +19,6 @@ package org.springframework.boot.cloudnativebuildpack.docker;
 import java.io.IOException;
 
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.condition.DisabledOnOs;
-import org.junit.jupiter.api.condition.OS;
 
 import org.springframework.boot.cloudnativebuildpack.docker.type.ImageReference;
 import org.springframework.boot.testsupport.testcontainers.DisabledIfDockerUnavailable;
@@ -31,7 +29,6 @@ import org.springframework.boot.testsupport.testcontainers.DisabledIfDockerUnava
  * @author Phillip Webb
  */
 @DisabledIfDockerUnavailable
-@DisabledOnOs(OS.LINUX)
 class DockerApiIntegrationTests {
 
 	private final DockerApi docker = new DockerApi();