VLC doesn't compile after r320405

[Piotr Kubaj]

The header stream_decoder.h should be included as FLAC/stream_decoder.h (the 
same with stream_encoder.h).
Patch:
---  modules/codec/flac.c      2013-06-10 13:19:02.244271596 +0200
+++ modules/codec/flac.c.orig 2013-06-10 13:20:22.986277754 +0200
@@ -38,8 +38,8 @@
 #include <vlc_codec.h>
 #include <vlc_aout.h>
 
+#include <FLAC/stream_decoder.h>
+#include <FLAC/stream_encoder.h>
-#include <stream_decoder.h>
-#include <stream_encoder.h>
 
 #include <vlc_block_helper.h>
 #include <vlc_bits.h>