Re-order shutdown hook in BootRunTask

spring-boot-tools/spring-boot-gradle-plugin/src/main/groovy/org/springframework/boot/gradle/run/BootRunTask.java

@@ -30,7 +30,6 @@ import org.gradle.process.ExecResult;
 import org.gradle.process.internal.DefaultJavaExecAction;
 import org.gradle.process.internal.ExecHandle;
 import org.springframework.boot.loader.tools.FileUtils;
-import org.springframework.boot.loader.tools.SignalUtils;
 import org.springframework.util.ReflectionUtils;
 
 /**
@@ -73,17 +72,22 @@ public class BootRunTask extends JavaExec {
 		DefaultJavaExecAction action = (DefaultJavaExecAction) builder.get(this);
 		setMain(getMain());
 		final ExecHandle execHandle = action.build();
-        ExecResult execResult = execHandle.start().waitForFinish();
-        if (!isIgnoreExitValue()) {
-            execResult.assertNormalExitValue();
-        }
-        SignalUtils.attachSignalHandler(new Runnable() {
+		try {
+			Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
+				
 				@Override
 				public void run() {
 					getLogger().info("Aborting java sub-process");
 					execHandle.abort();
 				}
-		});
+			}));
+		} catch (Exception e) {
+			getLogger().warn("Could not attach shutdown hook (child process may be orphaned)");
+		}
+		ExecResult execResult = execHandle.start().waitForFinish();
+		if (!isIgnoreExitValue()) {
+			execResult.assertNormalExitValue();
+		}
 		return execResult;
 	}