clang-tidy: Replace C headers with C++ alternatives

run-clang-tidy -header-filter='.*' -checks='-*,modernize-deprecated-headers'

Fixed manually as automatic fix would shuffle headers around.

taglib/xm/xmfile.cpp

@@ -29,7 +29,7 @@
 #include "modfileprivate.h"
 #include "tpropertymap.h"
 
-#include <string.h>
+#include <cstring>
 #include <algorithm>
 
 using namespace TagLib;