readelf: Add printing for STT_GNU_IFUNC

Author: https://github.com/BertalanD
Commit: 484f70fb43
Pull-request: https://github.com/SerenityOS/serenity/pull/13238
Reviewed-by: https://github.com/ADKaster

Userland/Utilities/readelf.cpp

@@ -152,6 +152,8 @@ static char const* object_symbol_type_to_string(ElfW(Word) type)
         return "FILE";
     case STT_TLS:
         return "TLS";
+    case STT_GNU_IFUNC:
+        return "IFUNC";
     case STT_LOPROC:
         return "LOPROC";
     case STT_HIPROC: