SmartOutputStream: Suppress false-positive resource leak warning

Change-Id: I013841ed2584f061c680a8adf0f777dcae3c5418
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/SmartOutputStream.java

@@ -105,6 +105,7 @@ class SmartOutputStream extends TemporaryBuffer {
 			// If output hasn't started yet, the entire thing fit into our
 			// buffer. Try to use a proper Content-Length header, and also
 			// deflate the response with gzip if it will be smaller.
+			@SuppressWarnings("resource")
 			TemporaryBuffer out = this;
 
 			if (256 < out.length() && acceptsGzipEncoding(req)) {