Update crates with correct crate_type attribute

src/cargo/cargo.rc

@@ -15,4 +15,6 @@
        uuid = "9ff87a04-8fed-4295-9ff8-f99bb802650b",
        url = "http://rust-lang.org/doc/cargo")];
 
+#[crate_type = "bin"];
+
 mod pgp;

src/comp/rustc.rc

@@ -7,7 +7,7 @@
 
 #[desc = "The Rust compiler"];
 #[license = "MIT"];
-#[crate_type = "bin"];
+#[crate_type = "lib"];
 
 use std (name = "std",
          vers = "0.1",

src/compiletest/compiletest.rc

@@ -1,3 +1,5 @@
+#[crate_type = "bin"];
+
 use std;
 
 mod procsrv;

src/fuzzer/fuzzer.rc

@@ -1,5 +1,7 @@
 // -*- rust -*-
 
+#[crate_type = "bin"];
+
 use std;
 use rustc;