Packaging: add Depends on curl

wmf-update-known-hosts-production calls curl, so this package should
Depends: on it.

Change-Id: I66a88d17bdfc3908b19e19581ae9b31ecf1f6043
diff --git a/debian/control b/debian/control
index aff361a..6cec757 100644
--- a/debian/control
+++ b/debian/control
@@ -10,7 +10,7 @@
 Provides: wmf-sre-laptop
 Replaces: wmf-sre-laptop
 Conflicts: wmf-sre-laptop, pwstore
-Depends: ruby, gnupg2, git, colordiff
+Depends: ruby, gnupg2, git, colordiff, curl
 Recommends: git-review (>= 1.27.0-1)
 Description: Basic configs/scripts for laptops of WMF SREs
  This package ships a number of common scripts and configs to setup a