Fix output logging bug that broke games that run in a Windows console

Since 29f9677 the shim hands every game the shim's std handles with
STARTF_USESTDHANDLES, so console APIs fail in a console game. Absolum's
Console.Clear() threw IOException: Invalid handle and the game exited
before opening a window.

Without the flag, an inherited stdout still reaches a windowed game, and
a console game's new console replaces all three handles. A detected
console game also skips inheritance, matching Proton's steam.cpp.

Author: NotProtonNot

steam-shim/steam.cpp

@@ -1475,12 +1475,9 @@ static HANDLE run_process(BOOL *should_await, BOOL game_process)
             si.wShowWindow = SW_HIDE;
         }
 
-        si.dwFlags |= STARTF_USESTDHANDLES;
-        si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
-        si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
-        si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+        BOOL inherit = !(flags & CREATE_NEW_CONSOLE);
 
-        if (!CreateProcessW(NULL, cmdline, NULL, NULL, TRUE, flags, NULL, NULL, &si, &pi))
+        if (!CreateProcessW(NULL, cmdline, NULL, NULL, inherit, flags, NULL, NULL, &si, &pi))
         {
             WINE_ERR("Failed to create process %s: %u\n", wine_dbgstr_w(cmdline), GetLastError());
             return INVALID_HANDLE_VALUE;