Install openssl-devel at bootstrap
Install openssl-devel at bootstrap

For some strange reason, openssl headers are required by some
dependencies (notably cryptography) on prepare, so they
should be installed in advance.

Change-Id: Id4dce0968f0c0c979f63ebe1b48f898f44c29ed1

mc2014/anvil,stackforge/anvil,mc2014/anvil,stackforge/anvil