rustc: add a lint to enforce uppercase statics.

src/libsyntax/syntax.rs

@@ -21,6 +21,7 @@
 #[crate_type = "lib"];
 
 #[allow(non_camel_case_types)];
+#[allow(non_uppercase_statics)];
 #[deny(deprecated_pattern)];
 
 extern mod extra;