UploadPack: Fix want-is-satisfied test

okToGiveUpImp() has been missing a ! for a long time.  This loop over
wantAll() is looking for an object where wantSatisfied() returns
false, because there is no common merge base present.  Unfortunately
it was missing a !, causing the loop to break and return false after
at least one want was satisified.

Bug: 301639
Change-Id: Ifdbe0b22c9cd0a9181546d090b4990d792d70c82
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java

@@ -586,7 +586,7 @@ public class UploadPack {
 
 		try {
 			for (RevObject obj : wantAll) {
-				if (wantSatisfied(obj))
+				if (!wantSatisfied(obj))
 					return false;
 			}
 			return true;