This patch moves the GSM-specific functions to the new library
libosmogsm which is provided by libosmocore.

I have also moved generate_backtrace() to backtrace.c instead
of gsm_utils.c, otherwise the timer and msgfile tests depend on
libosmogsm.

Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
diff --git a/include/osmocore/Makefile.am b/include/osmocore/Makefile.am
index a3b12ef..b65589a 100644
--- a/include/osmocore/Makefile.am
+++ b/include/osmocore/Makefile.am
@@ -2,7 +2,8 @@
 		   tlv.h bitvec.h comp128.h statistics.h gsm_utils.h utils.h \
 		   gsmtap.h write_queue.h rsl.h gsm48.h rxlev_stat.h mncc.h \
 		   gsm48_ie.h logging.h gsm0808.h rate_ctr.h gsmtap_util.h \
-		   plugin.h crc16.h panic.h process.h gsm0480.h msgfile.h
+		   plugin.h crc16.h panic.h process.h gsm0480.h msgfile.h \
+		   backtrace.h
 
 if ENABLE_TALLOC
 osmocore_HEADERS += talloc.h