rustc: Replace 'export meta' with attributes

Issue #487

Author: brson

src/comp/rustc.rc

@@ -1,10 +1,10 @@
 
 // -*- rust -*-
 
-meta export (name = "rustc",
-             uuid = "0ce89b41-2f92-459e-bbc1-8f5fe32f16cf",
-             url = "http://rust-lang.org/src/rustc",
-             vers = "0.1");
+#[name = "rustc"];
+#[vers = "0.1"];
+#[uuid = "0ce89b41-2f92-459e-bbc1-8f5fe32f16cf"];
+#[url = "http://rust-lang.org/src/rustc"];
 
 meta (desc = "The Rust compiler",
       license = "BSD");