Automated patch emails for Rust front-end commits

[dkm+gcc@kataplop.net]

Hello,

> Adding API calls was what I had in mind when I replied "I can have another try". In some other earlier prototype I already had such API calls :)

FYI, we've adjusted the script and the next emails should have pull-request URLs in the comment part. 

https://github.com/Rust-GCC/gccrs/pull/4306

Again, let us know if you want us to adjust again, or spot something strange :)

Marc