loci: extend match_v3 hack to OF 1.4

We should rename match_v3 to match_oxm.
diff --git a/c_gen/c_match.py b/c_gen/c_match.py
index 3afc99c..e5a41ef 100644
--- a/c_gen/c_match.py
+++ b/c_gen/c_match.py
@@ -104,6 +104,13 @@
 #define of_match_v4_to_match of_match_v3_to_match
 #define of_match_to_wire_match_v4 of_match_to_wire_match_v3
 #define of_match_v4_delete of_match_v3_delete
+
+#define of_match_v5_t of_match_v3_t
+#define of_match_v5_init of_match_v3_init
+#define of_match_v5_new of_match_v3_new
+#define of_match_v5_to_match of_match_v3_to_match
+#define of_match_to_wire_match_v5 of_match_to_wire_match_v3
+#define of_match_v5_delete of_match_v3_delete
 """)
 
 def gen_match_macros(out):