Function ostree_sys::ostree_sysroot_upgrader_new_for_os

pub unsafe extern "C" fn ostree_sysroot_upgrader_new_for_os(
    sysroot: *mut OstreeSysroot, 
    osname: *const c_char, 
    cancellable: *mut GCancellable, 
    error: *mut *mut GError
) -> *mut OstreeSysrootUpgrader