Add a missing #include <functional> to LIEF's bundled frozen/map.h, which
uses std::less without including it (fails with gcc-16+/libc++).

Same change as ::gentoo's nodejs-26.8.2-add-missing-funcational-inc.patch,
rebased onto node-v26.11.0: the bundled LIEF update added
frozen/bits/mpl.h and <iterator> around the old context, so the 26.8.2 copy
no longer applies at all. The + line is unchanged.
---
--- a/deps/LIEF/third-party/frozen/include/frozen/map.h
+++ b/deps/LIEF/third-party/frozen/include/frozen/map.h
@@ -29,6 +29,7 @@
 #include "frozen/bits/mpl.h"
 #include "frozen/bits/version.h"
 
+#include <functional>
 #include <iterator>
 #include <utility>