DO NOT MERGE Cherrypick from master: Allow d.a.c. to serve SVG files

Change-Id: I6d13b21bdafa70ea19d14a95b65476ba7c037d8c
diff --git a/scripts/app_engine_server/memcache_zipserve.py b/scripts/app_engine_server/memcache_zipserve.py
index c620596..bda33c0 100644
--- a/scripts/app_engine_server/memcache_zipserve.py
+++ b/scripts/app_engine_server/memcache_zipserve.py
@@ -337,6 +337,10 @@
       self.response.headers['Content-Type'] = 'application/octet-stream'
       self.SetCachingHeaders(mustRevalidate)
       self.response.out.write(resp_data)
+    elif name.endswith('.svg'):
+      self.response.headers['Content-Type'] = 'image/svg+xml'
+      self.SetCachingHeaders(mustRevalidate)
+      self.response.out.write(resp_data)
     return True
 
   def GetFromStore(self, file_path):