buildroot

hiawatha: bump to version 10.0

Now uses the new mbedtls package, and requires zlib.
Rename the SSL option description to TLS, but keep the same symbol
name to avoid pointless legacy.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>