Simplified DEPENDS. libfolly is all that's needed.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Fizz is a TLS 1.3 implementation.
Fizz currently supports TLS 1.3 drafts 28, 26 (both wire-compatible with
the final specification), and 23. All major handshake modes are
supported, including PSK resumption, early data, client authentication,
and HelloRetryRequest.

Compile tested: nbg6817 and arc700, openwrt master

Signed-off-by: Amol Bhave <ambhave@fb.com>