Add function for appending range1024 to bitvec

Add convenience function to append range1024 encoded data (see 3GPP TS
44.018 Annex J) to a given bitvec.
diff --git a/include/Makefile.am b/include/Makefile.am
index 0e5ed74..86aaf72 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -57,6 +57,7 @@
                        osmocom/gsm/apn.h \
                        osmocom/gsm/comp128.h \
                        osmocom/gsm/comp128v23.h \
+                       osmocom/gsm/bitvec_gsm.h \
                        osmocom/gsm/gan.h \
                        osmocom/gsm/gsm0341.h \
                        osmocom/gsm/gsm0411_smc.h \