Simplify dependencies.

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

[Depends on libwangle]

Facebook's branch of Apache Thrift, including a new C++ server.
Thrift is a serialization and RPC framework for service communication.
Thrift enables these features in all major languages, and there is
strong support for C++, Python, Hack, and Java.

Test Plan: compile fbthrift on openwrt master for nbg6817

Maintainer: me

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