Auto merge of #13097 - crypto-universe:mako_task, r=SimonSapin

Mako task

<!-- Please describe your changes on the following line: -->
Remove mako zip

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [X] These changes fix #12958 (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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r? @SimonSapin

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This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/13097)
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components/style/properties/build.py

@@ -7,7 +7,6 @@
 import sys
 
 BASE = os.path.dirname(__file__.replace('\\', '/'))
-sys.path.insert(0, os.path.join(BASE, "Mako-0.9.1.zip"))
 sys.path.insert(0, BASE)  # For importing `data.py`
 
 from mako import exceptions

python/requirements.txt

@@ -10,6 +10,7 @@ toml == 0.9.1
 flake8 == 2.4.1
 pep8 == 1.5.7
 pyflakes == 0.8.1
+mako == 0.9.1
 
 # For test-webidl
 ply == 3.8

tests/unit/style/properties/scaffolding.rs

@@ -32,6 +32,10 @@ fn properties_list_json() {
 
 #[cfg(windows)]
 fn find_python() -> String {
+    if Command::new("python2.7.exe").arg("--version").output().is_ok() {
+        return "python2.7.exe".to_owned();
+    }
+
     if Command::new("python27.exe").arg("--version").output().is_ok() {
         return "python27.exe".to_owned();
     }