new GDI Scaling API for Windows 10

#ifdef GDIDPISCALING
__kernel_entry W32KAPI BOOL
NtGdiScaleRgn(
    _In_ HDC hdc,
    _In_ HRGN hrgn);

__kernel_entry W32KAPI BOOL
NtGdiScaleValues(
    _In_ HDC hdc,
    __in_ecount(cl) LPLONG pl,
    _In_ UINT cl);

BOOL GreScaleValues(
    _In_ HDC hdc,
    __in_ecount(cl) LPLONG pl,
    _In_ UINT cl);

BOOL GreScaleRgn(
    _In_ HDC hdc,
    _In_ HRGN hrgn);

__kernel_entry W32KAPI LONG
NtGdiGetDCDpiScaleValue(
    _In_ HDC hdc);

__kernel_entry W32KAPI LONG
NtGdiGetBitmapDpiScaleValue(
    _In_ HBITMAP hbm);

LONG GreGetDCDpiScaleValue(
    _In_ HDC hdc);

LONG GreGetBitmapDpiScaleValue(
    _In_ HSURF hsurf);

#endif