Update ADD handling in Dockerfiles and test bundle creation

blimp/engine/Dockerfile

Index: blimp/engine/Dockerfile
diff --git a/blimp/engine/Dockerfile b/blimp/engine/Dockerfile
index 12b4b61894afe2372d701bfe99e715201485fdd0..e4ed62cae600e1119c261891b5c5a4e33e9c8f12 100644
--- a/blimp/engine/Dockerfile
+++ b/blimp/engine/Dockerfile
@@ -4,8 +4,8 @@ RUN mkdir /engine
 
 RUN useradd -ms /bin/bash blimp_user
 
-# The glob below expands to all files, but does not add directories
-# recursively.
+# The glob below expands to all files in the working directory and the
+# contents of any subdirectory there.

[Wez, 2016/07/16 00:26:36]

*scratches head*

How has the behaviour changed if the script commands haven't?

[Jess, 2016/07/16 01:10:32]

The behavior didn't change. The comment does not correctly describe the behavior
of docker.  At least not in the current version.

 ADD * /engine/
 ADD gen/third_party/blimp_fonts /engine/fonts
 RUN mv /engine/chrome_sandbox /engine/chrome-sandbox