install: Install the wget package.

We depend on it for installing node, and it's a standard package, not
a required one, so we do need to explicitly declare the dependency.

scripts/lib/install

@@ -130,7 +130,7 @@ fi
 
 apt-get -y dist-upgrade $APT_OPTIONS
 apt-get install -y \
-    puppet git curl \
+    puppet git curl wget \
     python python3 python-six python3-six crudini \
     $ADDITIONAL_PACKAGES