Expose OBJ_ANY in ObjectReader

Storage implementations or application code using an ObjectReader
may want to access this constant without being inside of a subclass
of the reader.

Change-Id: I6c871a03d5846b9bb899de4d14a265e8b204d8e0
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectReader.java

@@ -57,7 +57,7 @@ import org.eclipse.jgit.storage.pack.ObjectReuseAsIs;
  */
 public abstract class ObjectReader {
 	/** Type hint indicating the caller doesn't know the type. */
-	protected static final int OBJ_ANY = -1;
+	public static final int OBJ_ANY = -1;
 
 	/**
 	 * Construct a new reader from the same data.