Fix host add wrongly checking for execution (#1113)

packages/static/kairos-overlay-files/collection.yaml

@@ -1,4 +1,4 @@
 packages:
   - name: "kairos-overlay-files"
     category: "static"
-    version: "1.3.3"
+    version: "1.3.4"

packages/static/kairos-overlay-files/files/system/oem/31_hosts.yaml

@@ -4,8 +4,7 @@ stages:
     # is populated when running the configuration. For those cases we insert a record so it can be
     # manipulated later on by yip's hostname plugin
     # Read more: https://wiki.debian.org/ConfigPackages
-    - name: "Make sure hosts file is present and includes a record for 127.0.0.1"
-      if: |
-        ! [[ -f /etc/hosts ]] || ! [[ $(grep '127.0.0.1' /etc/hosts) ]]
+    - name: "Make sure hosts file includes a record for localhost"
+      if: "! grep -q 'localhost' /etc/hosts"
       commands:
         - echo '127.0.0.1\tlocalhost' >> /etc/hosts