Update scummvm to 1.6.0, also make it a packaged app.

examples/games/scummvm/nacl-scumm/index.yaml

Index: examples/games/scummvm/nacl-scumm/index.yaml
diff --git a/examples/games/scummvm/nacl-scumm/index.yaml b/examples/games/scummvm/nacl-scumm/index.yaml
deleted file mode 100644
index 9edd82982baec376069418a07d1af34793dcda17..0000000000000000000000000000000000000000
--- a/examples/games/scummvm/nacl-scumm/index.yaml
+++ /dev/null
@@ -1,16 +0,0 @@
-indexes:
-
-# AUTOGENERATED
-
-# This index.yaml is automatically updated whenever the dev_appserver
-# detects that a new type of query is run.  If you want to manage the
-# index.yaml file manually, remove the above marker line (the line
-# saying "# AUTOGENERATED").  If you want to manage some indexes
-# manually, move them above the marker line.  The index.yaml file is
-# automatically uploaded to the admin console when you next deploy
-# your application using appcfg.py.
-
-- kind: File
-  properties:
-  - name: owner
-  - name: filename