CMake: Avoid MSVC C4996 warnings

The qmake build system defines _CRT_SECURE_NO_WARNINGS in
mkspecs/features/qt_module.prf, the cmake build system should do the
same thing in qt_internal_add_module().

Adding this definition can avoid warnings like:
warning C4996: 'strncpy': This function or variable may be unsafe.

As a special case, Bootstrap uses add_library() instead of
qt_internal_add_module(), so _CRT_SECURE_NO_WARNINGS should also be
defined in src/tools/bootstrap/CMakeLists.txt.

Pick-to: 6.0
Change-Id: Ic82193d177f82785fd84948efa78c49ca8d8db46
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

0 files changed, 0 insertions, 0 deletions