Fix races when the same bits are downloaded from 2 URLs.

mojo/tools/data/apptests

Index: mojo/tools/data/apptests
diff --git a/mojo/tools/data/apptests b/mojo/tools/data/apptests
index 2e6d011a4b2e71572e591968f5b2d229b3654f40..c49c60856cdcbccc3decdbf81282430341898cee 100644
--- a/mojo/tools/data/apptests
+++ b/mojo/tools/data/apptests
@@ -33,6 +33,9 @@ tests = [
   {
     "test": "mojo:window_manager_apptests",
   },
+  {
+    "test": "mojo:shell_apptests",
+  },
 ]
 
 if config.target_os == config.OS_LINUX:
@@ -83,10 +86,4 @@ if config.target_os != config.OS_ANDROID:
       "test": "mojo:dart_apptests",
       "type": "dart",
     },
-    {
-      # https://github.com/domokit/mojo/issues/61
-      # Sometime the shell get a trucated application when exposed through the
-      # http server.
-      "test": "mojo:shell_apptests",
-    },
   ]