Enable utf8 I/O stuff when compiling with MinGW.
diff --git a/.gitignore b/.gitignore
index d277845..a24f4e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -69,3 +69,4 @@
 test/metaflac.flac
 test/picture.diff
 test/picture.log
+.dirstamp