Add some more crates to the blacklist

Author: nrc

src/main.rs

@@ -54,7 +54,10 @@ mod test;
 // Timeout = 1.5s (totally arbitrary).
 const COMPILER_TIMEOUT: u64 = 1500;
 
-const CRATE_BLACKLIST: [&'static str; 3] = ["libc", "typenum", "alloc"];
+const CRATE_BLACKLIST: [&'static str; 10] = [
+    "libc", "typenum", "alloc", "idna", "openssl", "libunicode_normalization", "serde",
+    "serde_json", "librustc_serialize", "libunicode_segmentation",
+];
 
 type Span = span::Span<span::ZeroIndexed>;