third-party/rust: update cbindgen with PRs #1006, #1007

Summary: [Fix an upstream bug](mozilla/cbindgen#1006) and [add ability to put arbitrary prefix on field names](mozilla/cbindgen#1007).

Reviewed By: jasonwhite

Differential Revision: D63878067

fbshipit-source-id: 16a35ed1fa2adc4c9211fc6f6332f0be7dbf4f56

Cargo.toml

@@ -1,6 +1,7 @@
 [patch.crates-io]
 abomonation = { git = "https://github.com/markbt/abomonation", rev = "0f43346d2afa2aedc64d61f3f4273e8d1e454642" }
 base64urlsafedata = { git = "https://github.com/kanidm/webauthn-rs.git", rev = "d278c56adfa39a0723c79bdcd461644194bc5138" }
+cbindgen = { git = "https://github.com/jsgf/cbindgen.git", rev = "e522aa9c35a9235f9e8ef03b1c54e41ee4cfafbd" }
 cxx = { package = "cxx", git = "https://github.com/facebookexperimental/cxx.git", rev = "2ea39c564284a70fdc1793fd72c442433e5a2638" }
 cxx-build = { package = "cxx-build", git = "https://github.com/facebookexperimental/cxx.git", rev = "2ea39c564284a70fdc1793fd72c442433e5a2638" }
 displaydoc = { git = "https://github.com/yaahc/displaydoc", rev = "7dc6e324b1788a6b7fb9f3a1953c512923a3e9f0" }