add ampproject.org/v0.js as a web-accessible-resources

src/web_accessible_resources/to-import.txt

@@ -28,6 +28,7 @@
 3x2-transparent.png
 addthis.com/addthis_widget.js
 amazon-adsystem.com/aax2/amzn_ads.js
+ampproject.org/v0.js
 antiAdBlock.js
 d3pkae9owd2lcf.cloudfront.net/mb105.js
 disqus.com/embed.js

tools/import-war.py

@@ -21,7 +21,7 @@ with open('./src/web_accessible_resources/to-import.txt', 'r') as f:
             to_import.add(line)
 
 # https://github.com/gorhill/uBlock/issues/3636
-safe_exts = { 'javascript': 'js' }
+safe_exts = { 'javascript': 'js', 'plain': 'txt' }
 
 imported = []