Update example_startup_script.sh (GoogleCloudPlatform#1240)

On latest Debian 9 image on GCP this startup script fails with this error: Nov 30 17:03:33 localhost startup-script: INFO startup-script: E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
abema · Nov 30, 2017 · e29bdfd · e29bdfd
1 parent 2a4b61d
commit e29bdfd
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/iap/example_startup_script.sh b/iap/example_startup_script.sh
@@ -1,3 +1,4 @@
+apt-get -y update
 apt-get -y install git
 apt-get -y install virtualenv
 git clone https://github.com/GoogleCloudPlatform/python-docs-samples