extend the crate whitelist to include rustc-hash, chalk

Author: nikomatsakis

src/tools/tidy/src/deps.rs

@@ -66,6 +66,8 @@ static WHITELIST: &'static [Crate] = &[
     Crate("bitflags"),
     Crate("byteorder"),
     Crate("cc"),
+    Crate("chalk-engine"),
+    Crate("chalk-macros"),
     Crate("cfg-if"),
     Crate("cmake"),
     Crate("crossbeam-deque"),
@@ -102,6 +104,7 @@ static WHITELIST: &'static [Crate] = &[
     Crate("regex-syntax"),
     Crate("remove_dir_all"),
     Crate("rustc-demangle"),
+    Crate("rustc-hash"),
     Crate("rustc-rayon"),
     Crate("rustc-rayon-core"),
     Crate("scoped-tls"),