Update YCM branch from personal to public maintained one #401
Description
最近在配置环境被人推荐了这个repo，实话实说还是很不错的，但是因为没什么人维护导致一些repo其实已经outdated但是没人发现，今天用M1 Mac配置环境一直在YCM那里报错
...
info: downloading installer
info: profile set to 'default'
info: default host triple is aarch64-apple-darwin
info: skipping toolchain installation
Rust is installed now. Great!
To get started you need Cargo's bin directory
(/var/folders/b1/0fd1b6hs7lz0fm_mh346lybm0000gn/T/rust_install_j921p9m6/bin) in
your PATH
environment variable. This has not been done automatically.
To configure your current shell, run:
source
"/var/folders/b1/0fd1b6hs7lz0fm_mh346lybm0000gn/T/rust_install_j921p9m6/env"
info: syncing channel updates for 'nightly-2019-06-06-aarch64-apple-darwin'
info: latest update on 2019-06-06, rust version 1.37.0-nightly (7cdaffd79 2019-06-05)
error: target 'aarch64-apple-darwin' not found in channel. Perhaps check https://doc.rust-lang.org/nightly/rustc/platform-support.html for available targets
首先发现这是version问题，然后一直在找找了很久才找到应该如何update hardcoded的version，https://gist.github.com/bobsomers/f733711b239d32268cb6dcbd87d44568，想着给大家提个醒然后在原作者的repo里面提了一个issue，最后发现我这个branch根本不是原作者的branch，是vimplus作者自己fork在gitee上面的。继续找了一会发现ycm其实是在install.sh里面就pull下来的并不是在vundle里面来的。。
如果可以把这个update一下或者直接去掉就好了，不然M1同学真的很难受，而且没有和原作者保持同步之后肯定也会有新的问题的。。。
问题code：https://github.com/chxuan/vimplus/blob/master/install.sh#L490