do not lower-case input file names
do not lower-case input file names

The idc tool modified the case of its DLL or EXE input,
causing it to be all lowercase.

Task-number: QTBUG-2870
Change-Id: Ic3c028a2696786fc5b11a4018bd3fc28e362935b
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@digia.com>

kobolabs/qtactiveqt,kobolabs/qtactiveqt