Declare dependencies on text_writer.

Transitive dependencies being available is considered a bug: rust-lang/cargo#1037
servo · bors-servo · Dec 29, 2014 · Dec 21, 2014 · Dec 21, 2014 · Dec 21, 2014
commit 540d21888558751a5fae0b71011306068a58bc6f
diff --git a/components/servo/Cargo.lock b/components/servo/Cargo.lock
diff --git a/components/style/Cargo.toml b/components/style/Cargo.toml
@@ -36,3 +36,5 @@ git = "https://github.com/servo/string-cache"
 [dependencies.string_cache_macros]
 git = "https://github.com/servo/string-cache"
 
+[dependencies]
+text_writer = "0.1.1"
diff --git a/components/util/Cargo.toml b/components/util/Cargo.toml
@@ -30,3 +30,6 @@ git = "https://github.com/servo/rust-url"
 
 [dependencies.time]
 git = "https://github.com/rust-lang/time"
+
+[dependencies]
+text_writer = "0.1.1"
diff --git a/ports/cef/Cargo.lock b/ports/cef/Cargo.lock
diff --git a/ports/gonk/Cargo.lock b/ports/gonk/Cargo.lock