Expose getType in ObjectToPack

Storage implementations may find this useful when implementing the
ObjectReuseAsIs interface on their ObjectReader.  Expose it so we
don't force them to create a redundant copy of the information.

Change-Id: I802ec8113c00884fccde5d0e92b9849716316f62
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

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

@@ -192,7 +192,8 @@ public class ObjectToPack extends PackedObjectInfo {
 		return getOffset() != 0;
 	}
 
-	int getType() {
+	/** @return the type of this object. */
+	public int getType() {
 		return (flags >> TYPE_SHIFT) & 0x7;
 	}