pkg dependency: Add the openssl package install.

This package is needed for testing SSL functionality.
We using both s_client and s_server mode from this package.

openssl-devel is already installed in scripts/pkgdep.
Here we adding the utility itself.

Change-Id: I389f4d273aefd82f2667aba620d00f17c3e557a9
Signed-off-by: Boris Glimcher <Boris.Glimcher@emc.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/12645


Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Michal Berger <michallinuxstuff@gmail.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>