tools: move cluster-specific stuff to cluster/tools

Change-Id: I1813bb221d1bff0d6067eceb84d23510face60ff
diff --git a/env.sh b/env.sh
index d058ea5..9b40724 100644
--- a/env.sh
+++ b/env.sh
@@ -12,7 +12,7 @@
     exit 1
 fi
 
-hscloud_path="$hscloud_root/bazel-bin/tools"
+hscloud_path="$hscloud_root/bazel-bin/tools:$hscloud_root/bazel-bin/cluster/tools"
 
 [[ ":$PATH:" != *":$hscloud_path:"* ]] && PATH="$hscloud_path:${PATH}"