Moved the 3rdparty folder containing the files needed by examples to the examples
directory so that the files are bundled with the Qt 5.5 release.

Change-Id: I544075c345efd329e853ae52dad31accfdfb388a
Task-number: QTBUG-45472
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>