Update cargo-c to rev 1 via SR 750425
    
    https://build.opensuse.org/request/show/750425
    by user dimstar_suse
    This provides cargo-cbuild and cargo-cinstall for building and installing C libraries of Rust software.
    
    Used by https://build.opensuse.org/package/show/home:gladiac/rav1e (AV1 encoder)