Tag*: move libtag.a sources to src/tag/

src/decoder/DsdLib.cxx

@@ -28,7 +28,7 @@
 #include "DecoderAPI.hxx"
 #include "util/bit_reverse.h"
 #include "TagHandler.hxx"
-#include "TagId3.hxx"
+#include "tag/TagId3.hxx"
 #include "util/Error.hxx"
 
 #include <unistd.h>

src/decoder/MadDecoderPlugin.cxx

@@ -21,8 +21,8 @@
 #include "MadDecoderPlugin.hxx"
 #include "DecoderAPI.hxx"
 #include "conf.h"
-#include "TagId3.hxx"
-#include "TagRva2.hxx"
+#include "tag/TagId3.hxx"
+#include "tag/TagRva2.hxx"
 #include "TagHandler.hxx"
 #include "CheckAudioFormat.hxx"
 #include "util/Error.hxx"

src/decoder/WavpackDecoderPlugin.cxx

@@ -23,7 +23,7 @@
 #include "InputStream.hxx"
 #include "CheckAudioFormat.hxx"
 #include "TagHandler.hxx"
-#include "ApeTag.hxx"
+#include "tag/ApeTag.hxx"
 #include "util/Error.hxx"
 
 #include <wavpack/wavpack.h>