[Mac, Regression] Application bundle created with problematic /Versions directory

Using a checkout on the Qt 5.5 branch from about 5 hours ago, when I build an application on Macintosh 10.9 or 10.10 in which, in the .pro file, I have

TEMPLATE = app

, the application bundle that is created has a directory structure that looks like this:

cd TestApp.app
ls -R
Contents	Versions

./Contents:
Info.plist	MacOS		PkgInfo		Resources

./Contents/MacOS:
TestApp

./Contents/Resources:
empty.lproj

./Versions:
Current

Note that there is a Versions directory in the top level of the bundle. There should only be a Contents directory in the top level of the bundle.

The presence of the Versions directory in the top level prevents codesign from being able to sign the bundle.