Merge pull request #218 from Vynce/wscript

Detect waf wscript files as Python

Author: asottile

identify/extensions.py

@@ -294,4 +294,5 @@
     'Rakefile': EXTENSIONS['rb'],
     'setup.cfg': EXTENSIONS['ini'],
     'WORKSPACE': EXTENSIONS['bzl'],
+    'wscript': EXTENSIONS['py'],
 }