Fix build on linux

src/File.cpp

 #include <cassert>
+#include <cstdlib>
+#include <cstring>
 
 #include "Album.h"
 #include "AlbumTrack.h"

src/Label.cpp

+#include <cassert>
+#include <cstdlib>
+#include <cstring>
+
 #include "Label.h"
 #include "File.h"
 #include "SqliteTools.h"
 
-#include <cassert>
-
 Label::Label( sqlite3* dbConnection, sqlite3_stmt* stmt )
     : m_dbConnection( dbConnection )
     , m_files( NULL )