Use jinja2 for make_runtime_features and make_internal_runtime_flags

Source/core/scripts/in_generator.py

Index: Source/core/scripts/in_generator.py
diff --git a/Source/core/scripts/in_generator.py b/Source/core/scripts/in_generator.py
index dad625ee354cab4a1ba1b969a087ab4175f0e357..175fb46861ead5b3bf6e55d0e8e541137938f46b 100644
--- a/Source/core/scripts/in_generator.py
+++ b/Source/core/scripts/in_generator.py
@@ -30,6 +30,7 @@ import os.path
 import shutil
 
 from in_file import InFile
+import template_expander
 
 
 class Writer(object):
@@ -84,6 +85,8 @@ class Writer(object):
 
     def _write_file(self, output_dir, generator, file_name):
         contents = generator()
+        if type(contents) is dict:
+            contents = template_expander.apply_template(file_name + ".tmpl", contents)
         if not contents:
             return
         path = os.path.join(output_dir, file_name)