cmake: update sha1 hash of source tarball

Update the value of sha1 hash of cmake-3.0.2.tar.gz downloaded from http://www.cmake.org/files/v3.0/cmake-3.0.2.tar.gz 

```
$ openssl sha1 /Library/Caches/Homebrew/cmake-3.0.2.tar.gz
SHA1(/Library/Caches/Homebrew/cmake-3.0.2.tar.gz)= c8c4cf266cb730c08abe59ee129c3b23f69134e8
```