Upgrade rust/crates/clang-sys to 1.2.0 am: 83337ed14d am: 27ab2c8393

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/clang-sys/+/1712591

Change-Id: Ia68195418b248d8a4c1aef92d18886e5d21d89ae