erofs-utils: rust: add rust version fuse program

This patch adds new configure script for checking
cross-compiling rustc/cargo/rustup and build erofsfuse
Rust version fuse based on autotools. The Xattr feature
hasn't been completed yet.

The program is the same copy from erofs-rs repo[1]

[1]: https://github.com/ToolmanP/erofs-rs

Signed-off-by: Yiyang Wu <toolmanp@tlmp.cc>