QFileSystemEngine::cloneFile: take copy_file_range returning ENOSYS as being unsupported

Index: qt6-base-6.10.2+dfsg/src/corelib/io/qfilesystemengine_unix.cpp
===================================================================
--- qt6-base-6.10.2+dfsg.orig/src/corelib/io/qfilesystemengine_unix.cpp
+++ qt6-base-6.10.2+dfsg/src/corelib/io/qfilesystemengine_unix.cpp
@@ -1204,6 +1204,7 @@ auto QFileSystemEngine::cloneFile(int sr
     switch (errno) {
     case EINVAL: // observed with some obscure filesystem combinations
     case EXDEV: // Linux can't do xdev file copies (FreeBSD can)
+    case ENOSYS: // Not supported by kernel
         break;
 
     default:
