Fix a bug in asn1c PER code when skipping unknown extension

Basically when skiping an unknown extension, asn1c did read 24 bits per
24 bits and later on failed if the remaining bits (up to 23) were
superior to 8.  The patch reads 1 bit per 1 bit.

(imported from openairinterface5g/openair2/RRC/LITE/MESSAGES/asn1c/asn1cpatch.p0)
diff --git a/skeletons/per_opentype.c b/skeletons/per_opentype.c
index 984a96d..8c42f8b 100644
--- a/skeletons/per_opentype.c
+++ b/skeletons/per_opentype.c
@@ -306,7 +306,7 @@
 	(void)constraints;
 	(void)sptr;
 
-	while(per_get_few_bits(pd, 24) >= 0);
+	while(per_get_few_bits(pd, 1) >= 0);
 
 	rv.code = RC_OK;
 	rv.consumed = pd->moved;