Add datastore support for bits

Change-Id: I9a1619f6b892bbde71e75376e9a3a84911236b5d
diff --git a/tests/example-schema.yang b/tests/example-schema.yang
index da45afd..372b83d 100644
--- a/tests/example-schema.yang
+++ b/tests/example-schema.yang
@@ -294,4 +294,13 @@
             type int32;
         }
     }
+
+    leaf flags {
+        type bits {
+            bit carry;
+            bit zero;
+            bit sign;
+            bit parity;
+        }
+    }
 }