Fixup init-vlsi.sh

scripts/init-vlsi.sh

@@ -1,3 +1,10 @@
+#!/usr/bin/env bash
+# exit script if any command fails 
+set -e
+set -o pipefail
+
+
+
 # Initialize HAMMER and CAD-plugins
 git submodule update --init --recursive vlsi/hammer
 git submodule update --init --recursive vlsi/hammer-cad-plugins