Revert "Upgrade clang-sys"
Revert "Upgrade clang-sys"

This reverts commit 933b4130470a776cd55841ea45d2c5a29d09d6c5.

Waiting for https://github.com/KyleMayes/clang-sys/issues/13 to be solved

Twinklebear/rust-bindgen,bsteinb/rust-bindgen,Twinklebear/rust-bindgen,alexander255/rust-bindgen,Twinklebear/rust-bindgen,bsteinb/rust-bindgen,alexander255/rust-bindgen,bsteinb/rust-bindgen,Twinklebear/rust-bindgen,alexander255/rust-bindgen