解决go delve 不能使用 OS X cannot get thread count

go Delve 报错

mac 解决方法如下：
我的go版本 ：go version go1.7.3 darwin/amd64

https://github.com/derekparker/delve/issues/645
`

1. go into your GOPATH
2. create folder $GOPATH/src/github.com/derekparker/, and go into this folder.
3. ‘cd $GOPATH/src/github.com/derekparker/’
4. git clone https://github.com/derekparker/delve.git
5. cd delve
6. git fetch origin pull/665/head
7. git checkout FETCH_HEAD
8. CERT=dlv-cert make install
   `