Prefix the various CLSID/IID symbols by 'q'.

Avoid clashes with the various MinGW libraries.

Task-number: QTBUG-34638

Change-Id: I1fe0e1b79b52f887522c1c19a15bbdcb256fd917
Reviewed-by: Ivan Vizir <define-true-false@yandex.com>
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>