text/unicode: only use WriteConsoleW with WINAPI_PARTITION_APP

that's how it's defined in the Platform SDK and ming-w64

src/text/unicode.c

@@ -59,7 +59,7 @@ int utf8_vfprintf( FILE *stream, const char *fmt, va_list ap )
     if (unlikely(res == -1))
         return -1;
 
-#ifndef VLC_WINSTORE_APP
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
     /* Writing to the console is a lot of fun on Microsoft Windows.
      * If you use the standard I/O functions, you must use the OEM code page,
      * which is different from the usual ANSI code page. Or maybe not, if the
@@ -89,7 +89,7 @@ int utf8_vfprintf( FILE *stream, const char *fmt, va_list ap )
     }
     else
         res = -1;
-#ifndef VLC_WINSTORE_APP
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
 out:
 #endif
     free (str);