Delete rest of rustrt

... and address other rebasing fallout.

Author: aturon

src/librustrt/lib.rs

@@ -1516,7 +1516,7 @@ mod test {
 
         // wait for the child task to exit before we exit
         rx2.recv();
-    })
+    }}
 }
 
 #[cfg(test)]

src/libstd/comm/mod.rs

@@ -41,6 +41,7 @@ use option::Option;
 use option::Option::{Some, None};
 use ops::{Deref, DerefMut, FnOnce};
 use result::Result::{Ok, Err};
+use rt;
 use slice::SliceExt;
 use str::StrPrelude;
 use string::String;