PackWriter: Fix total delta count

The total delta count is supposed to include reused deltas, not
just newly created deltas.

Change-Id: I98cbdcef80d59714a4f62ff322e7b709b08b6d26
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackWriter.java

 				out.endObject();
 				otp.setCRC(out.getCRC32());
 				stats.reusedObjects++;
-				if (otp.isDeltaRepresentation())
+				if (otp.isDeltaRepresentation()) {
+					stats.totalDeltas++;
 					stats.reusedDeltas++;
+				}
 				return;
 			} catch (StoredObjectRepresentationNotAvailableException gone) {
 				if (otp.getOffset() == out.length()) {