port/merge Eurecom APER support from OPENAIRMME

Eurecom has developed APER support for asn1c as part of the OPENAIRMME
softare (a LTE MME).  This is too important to let it bit-rout out
of asn1c.  Let's forward-port and merge it.
diff --git a/skeletons/OCTET_STRING.h b/skeletons/OCTET_STRING.h
index 013c7b1..bc25666 100644
--- a/skeletons/OCTET_STRING.h
+++ b/skeletons/OCTET_STRING.h
@@ -32,6 +32,8 @@
 xer_type_encoder_f OCTET_STRING_encode_xer_utf8;
 per_type_decoder_f OCTET_STRING_decode_uper;
 per_type_encoder_f OCTET_STRING_encode_uper;
+per_type_decoder_f OCTET_STRING_decode_aper;
+per_type_encoder_f OCTET_STRING_encode_aper;
 
 /******************************
  * Handy conversion routines. *