package/erlang: build host-erlang with support for openssl

Erlang uses openssl for all things crypto.

Since there are host Erlang tools that use crypto (such as rebar), we
need to build host-erlang with support for crypto, and thus it shall
depends on openssl.

Suggested-by: Frank Hunleth <fhunleth@troodon-software.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Frank Hunleth <fhunleth@troodon-software.com>
Cc: Johan Oudinet <johan.oudinet@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>