auto merge of #8914 : Dretch/rust/native-glob, r=alexcrichton

This is #8201 with a bunch of amendments to address the comments (and re-based).

Author: bors

src/libextra/extra.rs

@@ -85,6 +85,7 @@ pub mod getopts;
 pub mod json;
 pub mod md4;
 pub mod tempfile;
+pub mod glob;
 pub mod term;
 pub mod time;
 pub mod arena;