headers: crt: disable cwait/_cwait in winstore builds

It's not allowed to launch another process (as far as 2016 doc goes):
https://docs.microsoft.com/en-us/cpp/cppcx/crt-functions-not-supported-in-universal-windows-platform-apps?view=vs-2019

"These functions are used to read and write directly from and to the console.
UWP apps are GUI only; they don't support console."

Signed-off-by: Liu Hao <lh_mouse@126.com>
1 file changed