sim: bpf/cris: include cgen-mem in decoders

These arches use cgen memory functions, so make sure to include the
header in the modules.

sim/bpf/decode-be.c

@@ -27,6 +27,8 @@ This file is part of the GNU simulators.
 
 #include "sim-main.h"
 #include "sim-assert.h"
+#include "cgen-mem.h"
+#include "cgen-ops.h"
 
 /* The instruction descriptor array.
    This is computed at runtime.  Space for it is not malloc'd to save a