CGitVsJGitRandomIgnorePatternTest: Open OutputStream in try-with-resource

Change-Id: I08e27d0ee48dabd94a4eeb608508f815a3000ec9
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.test/exttst/org/eclipse/jgit/ignore/CGitVsJGitRandomIgnorePatternTest.java

@@ -187,10 +187,10 @@ public class CGitVsJGitRandomIgnorePatternTest {
 					"--no-index", "-v", "-n", "--stdin" };
 			Process proc = Runtime.getRuntime().exec(command, new String[0],
 					gitDir);
-			OutputStream out = proc.getOutputStream();
+			try (OutputStream out = proc.getOutputStream()) {
 				out.write((path + "\n").getBytes(UTF_8));
 				out.flush();
-			out.close();
+			}
 			return proc;
 		}