Bump parking-lot to version 0.12.0

Summary:
~~~Added new parking-lot version named parking_lot_0_12~~~
allow-large-files

previous versions of parking-lot are incompatible with wasm compilation targets

rustwasm/wasm-bindgen#2160
Amanieu/parking_lot#302

Reviewed By: dtolnay

Differential Revision: D33985872

fbshipit-source-id: ce571ef50289fe97ff89dbf72d2c7f39fbd47758

Author: mofeiZ

hphp/hack/Cargo.lock

@@ -11,7 +11,7 @@ crate-type = ["lib", "staticlib"]
 [dependencies]
 depgraph = { path = "../depgraph" }
 memmap = "0.7"
-parking_lot = { version = "0.11.2", features = ["send_guard"] }
+parking_lot = { version = "0.12.0", features = ["send_guard"] }
 rayon = "1.2"
 
 [dev-dependencies]

hphp/hack/src/depgraph/cargo/depgraph_writer/Cargo.toml

@@ -17,5 +17,5 @@ deps_rust = { path = "../../../deps/cargo/deps_rust" }
 env_logger = "0.7"
 log = { version = "0.4.14", features = ["kv_unstable", "kv_unstable_std"] }
 ocamlrep_ocamlpool = { path = "../../../ocamlrep_ocamlpool" }
-parking_lot = { version = "0.11.2", features = ["send_guard"] }
+parking_lot = { version = "0.12.0", features = ["send_guard"] }
 rayon = "1.2"