Install python3.6-dev package in packer

Add python3.6-dev package which is needed by
pyCrypto.

Change-Id: Iaaa3fb8ca8d464e02af71ae50656861a5d104076
Issue-ID: CIMAN-108
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
2 files changed