Auto merge of #31162 - mopp:fix_configure_for_new_clang, r=alexcrichton
Auto merge of #31162 - mopp:fix_configure_for_new_clang, r=alexcrichton

Version of Clang in repository is 3.9

So, error is caused by
```
./configure --enable-dist-host-only --enable-clang
```
Then, I got
```
configure: error: bad CLANG version: 3.9.0 (http://llvm.org/git/clang.git 3d5d4c39659f11dfbe8e11c857cadf5c449b559b) (http://llvm.org/git/llvm.git, need >=3.0svn
```

I fixed this issue by appending 3.9* in the if sentence.
Thanks.

graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,aidancully/rust