make runtime depend on bpf_loader (#4601)

* make runtime depend on bpf_loader

* remove vote redundancy, move bpf_loader to genesis, export program\! from bpf_loader crate

* move bpf_loader specification into genesis

* bpf tests to use genesis with bpf

* need to avoid depending on programs, except for macros

runtime/src/lib.rs

@@ -27,5 +27,8 @@ extern crate solana_vote_program;
 #[macro_use]
 extern crate solana_stake_program;
 
+#[macro_use]
+extern crate solana_bpf_loader;
+
 #[macro_use]
 extern crate serde_derive;