utils: Work around windeployqt bug.
For Qt versions less than 5.14 MinGW windeployqt requires passing
--release or --debug to pick the correct libs to deploy. For newer
version this must not be passed, or otherwise windeployqt errors out.
Use a conditional expression to only add the parameter for older Qt
versions.
Change-Id: I7afe2b77e9829e989adaeeb7c7499d5955926da2