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/BIT_STRING.c b/skeletons/BIT_STRING.c
index 9e0e50c..ad2ca60 100644
--- a/skeletons/BIT_STRING.c
+++ b/skeletons/BIT_STRING.c
@@ -29,6 +29,8 @@
 	BIT_STRING_encode_xer,
 	OCTET_STRING_decode_uper,	/* Unaligned PER decoder */
 	OCTET_STRING_encode_uper,	/* Unaligned PER encoder */
+	OCTET_STRING_decode_aper,	/* Aligned PER decoder */
+	OCTET_STRING_encode_aper,	/* Aligned PER encoder */
 	0, /* Use generic outmost tag fetcher */
 	asn_DEF_BIT_STRING_tags,
 	sizeof(asn_DEF_BIT_STRING_tags)