DfsReaderIoStats: getters to object size index micros/bytes

These properties of the stats object don't have a getter and it is
required to export those values in logs.

Change-Id: I7f91a38ee4d02668aff1cbc8424ea669cdb1d2f7

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsReaderIoStats.java

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsReaderIoStats.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsReaderIoStats.java
index 1e5e439..fcfa3e0 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsReaderIoStats.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsReaderIoStats.java
@@ -249,6 +249,15 @@ public long getCommitGraphBytes() {
 	}
 
 	/**
+	 * Get total number of bytes read from object size indexes.
+	 *
+	 * @return total number of bytes read from object size indexes.
+	 */
+	public long getObjectSizeIndexBytes() {
+		return stats.readObjectSizeIndexBytes;
+	}
+
+	/**
 	 * Get total microseconds spent reading pack indexes.
 	 *
 	 * @return total microseconds spent reading pack indexes.
@@ -285,6 +294,15 @@ public long getReadCommitGraphMicros() {
 	}
 
 	/**
+	 * Get total microseconds spent reading object size indexes.
+	 *
+	 * @return total microseconds spent reading object size indexes.
+	 */
+	public long getReadObjectSizeIndexMicros() {
+		return stats.readObjectSizeIndexMicros;
+	}
+
+	/**
 	 * Get total number of block cache hits.
 	 *
 	 * @return total number of block cache hits.