test: cmd: Use UTF_CONSOLE in tests

Set this flag rather than doing things manually in the test.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/cmd/wget.c b/test/cmd/wget.c
index 1ce167c..a91aa24 100644
--- a/test/cmd/wget.c
+++ b/test/cmd/wget.c
@@ -223,4 +223,4 @@
 
 	return 0;
 }
-LIB_TEST(net_test_wget, 0);
+LIB_TEST(net_test_wget, UTF_CONSOLE);