Include krb-dev pieces in travis setup

This ensures we pull the latest versions out of the sssd repo, rather than
what is installed by default on travis.

Author: frozencemetery

.travis.yml

@@ -9,7 +9,7 @@ install:
   - "sudo hostname test.box"
   - "sudo apt-add-repository -y ppa:sssd/updates "
   - "sudo apt-get update -q"
-  - "DEBIAN_FRONTEND=noninteractive sudo apt-get install -qq krb5-user krb5-kdc krb5-admin-server"
+  - "DEBIAN_FRONTEND=noninteractive sudo apt-get install -qq krb5-user krb5-kdc krb5-admin-server libkrb5-dev krb5-multidev"
   - "pip install --install-option='--no-cython-compile' cython"
   - "pip install -r test-requirements.txt"