vs2017 x64: error C2666 'operator /': 10 overloads have similar conversions, when using std::bitset with QtCore

MSVC 64bit: Compile error C2666 when using std::bitset with QtCore

添加宏：QT_NO_FLOAT16_OPERATORS

 

 参考：[QTBUG-72073] [REG 5.11->5.12] MSVC 64bit: Compile error C2666 when using std::bitset with QtCore - Qt Bug Tracker