Add local_path template in WORKSPACE

Change-Id: I666c8ffd2f478f069f1a31125bd341da9b57762d
diff --git a/WORKSPACE b/WORKSPACE
index 653e59f..522852b 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -4,6 +4,7 @@
 
 load_bazlets(
     commit = "b750c0adec6deebb1063219787a97fab1d32724b",
+    #local_path = "/home/<user>/projects/bazlets",
 )
 
 # Release Plugin API