Only print stack trace to Sytem.err when debug flag is set

Bug: 362100
Change-Id: Id18de9660f0dc2fb6c30db9770f31f26c874022d

org.eclipse.jgit/src/org/eclipse/jgit/util/FS.java

@@ -304,14 +304,16 @@ public abstract class FS {
 							}
 					} catch (IOException e) {
 						// Just print on stderr for debugging
-						e.printStackTrace(System.err);
+						if (debug)
+							e.printStackTrace(System.err);
 						gooblerFail.set(true);
 					}
 					try {
 						is.close();
 					} catch (IOException e) {
 						// Just print on stderr for debugging
-						e.printStackTrace(System.err);
+						if (debug)
+							e.printStackTrace(System.err);
 						gooblerFail.set(true);
 					}
 				}