drop libcommon completely, move remaining files to libbsc

Move gsm_data.c and handover_cfg.c to libbsc, where they belong.

This leaves libcommon utterly empty, drop it.

Change-Id: I6178061fa30c7e1a4c22c29d3c8f508b1033569f
diff --git a/src/libbsc/Makefile.am b/src/libbsc/Makefile.am
index d118f44..f03b498 100644
--- a/src/libbsc/Makefile.am
+++ b/src/libbsc/Makefile.am
@@ -37,6 +37,7 @@
 	bts_unknown.c \
 	bts_sysmobts.c \
 	chan_alloc.c \
+	gsm_data.c \
 	handover_decision.c \
 	handover_logic.c \
 	meas_rep.c \
@@ -58,5 +59,6 @@
 	bsc_dyn_ts.c \
 	bts_ipaccess_nanobts_omlattr.c \
 	handover_vty.c \
+	handover_cfg.c \
 	$(NULL)