SAR: don't follow symbolic links for system slot

Change-Id: I8ea5606007d72d8b2127a14709b2e33976ad963b
diff --git a/partition.cpp b/partition.cpp
index b31b228..f108087 100755
--- a/partition.cpp
+++ b/partition.cpp
@@ -359,7 +359,8 @@
 				return false;
 			} else {
 				Primary_Block_Device = ptr;
-				Find_Real_Block_Device(Primary_Block_Device, Display_Error);
+				if (PartitionManager.Get_Android_Root_Path() != "/system_root")
+					Find_Real_Block_Device(Primary_Block_Device, Display_Error);
 			}
 			item_index++;
 		} else if (item_index > 2) {