LibC+LibELF: Add definitions for extra dtags

These are found in some libraries, and LibELF doesn't know how to handle
them, not even their name. Adding these definitions should at least help
readelf display information correctly, but more work is needed to
actually implement them.

Userland/Libraries/LibELF/DynamicObject.cpp

@@ -422,6 +422,16 @@ const char* DynamicObject::name_for_dtag(ElfW(Sword) d_tag)
         return "RELCOUNT"; /* relocs, which must come first */
     case DT_FLAGS_1:
         return "FLAGS_1";
+    case DT_VERDEF:
+        return "VERDEF";
+    case DT_VERDEFNUM:
+        return "VERDEFNUM";
+    case DT_VERSYM:
+        return "VERSYM";
+    case DT_VERNEEDED:
+        return "VERNEEDED";
+    case DT_VERNEEDEDNUM:
+        return "VERNEEDEDNUM";
     default:
         return "??";
     }