Add Xbox One port.

src/lib_io.c

@@ -99,7 +99,7 @@ static int io_file_close(lua_State *L, IOFileUD *iof)
     int stat = -1;
 #if LJ_TARGET_POSIX
     stat = pclose(iof->fp);
-#elif LJ_TARGET_WINDOWS
+#elif LJ_TARGET_WINDOWS && !LJ_TARGET_XBOXONE
     stat = _pclose(iof->fp);
 #else
     lua_assert(0);
@@ -400,7 +400,7 @@ LJLIB_CF(io_open)
 
 LJLIB_CF(io_popen)
 {
-#if LJ_TARGET_POSIX || LJ_TARGET_WINDOWS
+#if LJ_TARGET_POSIX || (LJ_TARGET_WINDOWS && !LJ_TARGET_XBOXONE)
   const char *fname = strdata(lj_lib_checkstr(L, 1));
   GCstr *s = lj_lib_optstr(L, 2);
   const char *mode = s ? strdata(s) : "r";