Rename metadata::defs to metadata::tags

Author: brson

src/comp/metadata/creader.rs

@@ -19,7 +19,7 @@ import std::option;
 import std::option::none;
 import std::option::some;
 import std::map::hashmap;
-import defs::*;
+import tags::*;
 
 export read_crates;
 export list_file_metadata;

src/comp/metadata/decoder.rs

@@ -7,7 +7,7 @@ import std::str;
 import std::io;
 import front::ast;
 import middle::ty;
-import defs::*;
+import tags::*;
 import tydecode::parse_def_id;
 import tydecode::parse_ty_data;
 import driver::session;

src/comp/metadata/encoder.rs

@@ -9,7 +9,7 @@ import std::option::some;
 import std::option::none;
 import std::ebml;
 import front::ast::*;
-import defs::*;
+import tags::*;
 import middle::trans::crate_ctxt;
 import middle::trans::node_id_type;
 import middle::ty;

src/comp/metadata/defs.rs renamed to src/comp/metadata/tags.rs

@@ -68,7 +68,7 @@ mod metadata {
     export decoder;
     export creader;
 
-    mod defs;
+    mod tags;
     mod tyencode;
     mod tydecode;
     mod encoder;