[PATCH] user32: add stub for SetThreadDpiAwarenessContext [v2]

[Louis Lenders]

v2: moved stub from misc.c --> sysparam.c

This should help for https://bugs.winehq.org/show_bug.cgi?id=44719
I checked it helps another app  found that uses this function on

https://bitbucket.org/toptensoftware/minimalopengl/