Unfork and update bindgen

Summary:
Both waiting-in PRs have been merged and released:

- rust-lang/rust-bindgen#2319
- rust-lang/rust-bindgen#2326

Adding `artifact = "bin"` removes the need for the `lib.rs` patch:

- fbsource/bindgen@3579276

Reviewed By: jsgf

Differential Revision: D44301594

fbshipit-source-id: d5ac1b54b099655e8e87974e42439bcd32aa5aed

Cargo.toml

@@ -1,8 +1,6 @@
 [patch.crates-io]
 abomonation = { git = "https://github.com/markbt/abomonation", rev = "0f43346d2afa2aedc64d61f3f4273e8d1e454642" }
 aes-gcm-siv = { git = "https://github.com/lei2022/AEADs", rev = "d9d03399fbc1347a1c2941801c0743e847980757" }
-bindgen = { git = "https://github.com/fbsource/bindgen", rev = "65cde6d7eed1b6785d3c4186f326b4470a680e7b" }
-bindgen-cli = { git = "https://github.com/fbsource/bindgen", rev = "65cde6d7eed1b6785d3c4186f326b4470a680e7b" }
 curve25519-dalek = { git = "https://github.com/hariria/curve25519-dalek", rev = "1f39e7b369dc70f432370c9703229a45bfa9664e" }
 daemonize = { git = "https://github.com/krallin/daemonize", rev = "f7be28efa1b4a70e43bb37b5f4ff4d664992edca" }
 graphql-parser = { git = "https://github.com/graphql-rust//graphql-parser", rev = "8d76425d83c40670570cc325f57c730262f07456" }