Move Mako-related files into a new sub-directory.

There’s gonna be more of them.

components/style/build.rs

@@ -3,6 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use std::env;
+use std::path::Path;
 use std::process::{Command, exit};
 
 #[cfg(windows)]
@@ -29,9 +30,12 @@ fn find_python() -> String {
 
 fn main() {
     let python = env::var("PYTHON").ok().unwrap_or_else(find_python);
+    let script = Path::new(file!()).parent().unwrap().join("properties").join("build.py");
     let product = if cfg!(feature = "gecko") { "gecko" } else { "servo" };
     let status = Command::new(python)
-        .args(&["generate_properties_rs.py", product, "rust"])
+        .arg(&script)
+        .arg(product)
+        .arg("rust")
         .status()
         .unwrap();
     if !status.success() {

components/style/properties/build.py

@@ -59,7 +59,7 @@ def write_html(template):
     )
     _, html = render("properties.html.mako", properties=properties)
 
-    doc_servo = os.path.join(BASE, "..", "..", "target", "doc", "servo")
+    doc_servo = os.path.join(BASE, "..", "..", "..", "target", "doc", "servo")
     write(doc_servo, "css-properties.json", json.dumps(properties, indent=4))
     write(doc_servo, "css-properties.html", html)