qtdeclarative examples don't run from shadow build

1. Build a qtdeclarative example in a shadow build directory.
   I tried qtdeclarative\examples\quick\mousearea and qtdeclarative\examples\quick\animation. Both build fine.
2. Try to run the result.
   The program will exit right away. Qt Creator will show:

   The program has unexpectedly finished.
   C:\Users\rob\Git\Qt-5.0\qtdeclarative\examples\quick\mousearea-build-Desktop_Qt_5_0_0_beta2_MSVC2010_32bit_SDK-Debug\debug\mousearea.exe exited with code -1
   

   When started from the command line, the example doesn't run either.

3. Build the same example in source directory.
4. Try to run the result.
   Now the program runs correctly.

Examples should always run correctly. No matter if built in source or shadow build directory.