Add some (non-functional) input-readingn to rustc.rs.

src/comp/driver/rustc.rs

@@ -1,8 +1,22 @@
 // -*- rust -*-
 
 fn main(vec[str] args) -> () {
+
   log "This is the rust 'self-hosted' compiler.";
   log "The one written in rust.";
   log "It does nothing yet, it's a placeholder.";
   log "You want rustboot, the compiler next door.";
+
+  auto i = 0;
+  for (str filename in args) {
+    if (i > 0) {
+      auto br = std._io.new_buf_reader(filename);
+      log "opened file: " + filename;
+      for (u8 b in br.read()) {
+        log b;
+      }
+    }
+    i += 1;
+  }
+
 }