fix bench test for arc::arc camelcase

src/test/bench/graph500-bfs.rs

@@ -206,7 +206,7 @@ fn bfs2(graph: graph, key: node_id) -> bfs_result {
 }
 
 /// A parallel version of the bfs function.
-fn pbfs(&&graph: arc::arc<graph>, key: node_id) -> bfs_result {
+fn pbfs(&&graph: arc::ARC<graph>, key: node_id) -> bfs_result {
     // This works by doing functional updates of a color vector.
 
     enum color {

src/test/bench/msgsend-ring-mutex-arcs.rs

@@ -14,7 +14,7 @@ import std::time;
 import std::arc;
 
 // A poor man's pipe.
-type pipe = arc::mutex_arc<~[uint]>;
+type pipe = arc::MutexARC<~[uint]>;
 
 fn send(p: &pipe, msg: uint) {
     do p.access_cond |state, cond| {

src/test/bench/msgsend-ring-rw-arcs.rs

@@ -14,7 +14,7 @@ import std::time;
 import std::arc;
 
 // A poor man's pipe.
-type pipe = arc::rw_arc<~[uint]>;
+type pipe = arc::RWARC<~[uint]>;
 
 fn send(p: &pipe, msg: uint) {
     do p.write_cond |state, cond| {